NEW MAGIC SQUARES WHEEL METHOD
Part M3
How to Spoke Shift 7x7 Magic Squares
A magic square is an arrangement of numbers 1,2,3,... n^{2} where every row,
column and diagonal add up to the same magic sum S and n is also the order
of the square. A magic square having all pairs of cells diametrically equidistant
from the center of the square and equal to the sum of the first and last terms of the series
n^{2} + 1 is also called associated or symmetric. In addition,
the center of this type of square must always
contain the middle number of the series, i.e., ½(n^{2} + 1).
This site introduces a new methods used for the construction of border wheel type squares except that the initial spoke parts are added in a somewhat
different manner than in the original wheel method. The method consists of forming an internal 3x3 magic square, then generating all subsequent border magic squares.
as was done in the original method. The difference between this type of square and the original is that the left diagonal
numbers don't have to be chosen from the consecutive group ½(n^{2}n+2) to ½(n^{2}+n)
but may be chosen from any other consecutive group of numbers. However, every spoke on the wheel consists of consecutive numbers and their complements.
For example, the complementary numbers (22,23,24,25,26,27,28) from the list:
1  2 
3  4  5  6 
7  8  9  10 
11  12  13  14 
15  16  17  18 
19  20  21  22 
23  24 
 25 
49  48  47 
46  45  44  43 
42  41  40  39 
38  37  36  35 
34  33  32  31 
30  29  28  27 
26 
are placed in the central column and not on the diagonal.
The symbol Δ will be used to specify a number added to or subtracted from the constants a, b or c to generate the first internal 3x3 magic square.
In this case Δ is, consequently, obtained from the first number of the set (19,20,21) used to generate the
left diagonal, 25 − 19.
In addition, 4n + 1 number behave differently from
4n + 3
in that in the former at least one number in the set must be less than or equal to 0, while in the latter all numbers from 1 to
½(n^{2} − 1) are usable half of the time.
3x3 template
c+Δ  a 
b+Δ 
a+2Δ 
b  c 
bΔ 
c+2Δ  a+Δ 
A 7x7 Transposed Magic Square Using the Diagonals {16,17,18,25,32,33,34} and {21,20,19,25,31,30,29}
 Generate a 3x3 square using Δ=6, b=25 and a=26. (Square A1).
 Generate Square A2 by adding consecutive numbers to the two diagonals and the central column and row
(the "spoke") and include their complements from the complement list above.
 To begin filling up the square add up the entries on the first row and subtract from 175 (the magic sum for a 7x7 square). This affords the value 102 which divided by 2
gives the sum of pairs needed to fill up that line, which in this case may be (51 x 2) but because of the way the complement table is structured (in groups of three)
is (46 + 56). See Figure A2.
 Repeat for row 2 except subtract the value from 125 (the magic sum for a 5x5 square). This gives a value of 51.
 Repeat for rows 6 and 7 obtaining, respectively, 49 and 98.
 Then repeat for columns 1 and 2 obtaining, respectively, 102 and 51.
 Finally repeat for columns 6 and 7 obtaining, respectively, 49 and 98.
 Fill the 1^{st} & 7^{th} and 2^{nd} & 6^{th} rows with the pairs/complements from the complement list corresponding to
the requisite sums, (2,6), (14,8) and (1,0) and enter into Square A3.
 Fill the 1^{st} & 7^{th} and 2^{nd} & 6^{th} columns with the pairs/complements from the complement list corresponding to
the requisite sums, (5,9), (15,13) and (3,4) and enter into Square A4.
 Figure A shows the connectivity between numbers in the complementary table where the red bars are the
"spoke" numbers.
Figure A
 Square A5 shows the 3 border squares in "border format".
 The complement table below also shows how the color pairs are layed out (for comparison with Square A4).
A1 (Δ=6)
  
  

  
  

  18  26 
31   
  38 
25  12 
 
  19 
24  32 
 
  
 
 
  
  


⇒ 
A2
16   
28   
29  102 
 17  
27   30 
 51 
  18  26 
31    
40  39  38 
25  12 
11  10  
  19 
24  32 
  
 20  
23  
33   49 
21   
22   
34  98 
102  51 
 
 49 
98  

⇒ 
A3
16  2  14 
28  42  44 
29 
 17  1 
27  50  30 

  18  26 
31   
40  39  38 
25  12 
11  10 
  19 
24  32 
 
 20  49 
23  0 
33  
21  48  36 
22  8  6 
34 

 ⇒ 
A4
16  2  14 
28  42  44 
29 
5  17  1 
27  50  30 
45 
15  3  18 
26  31 
47  35 
40  39  38 
25  12 
11  10 
37  46  19 
24  32 
4  13 
41  20  49 
23  0 
33  9 
21  48  36 
22  8  6 
34 

⇒ 
A5
16  2  14 
28  42  44 
29 
5  17  1 
27  50  30 
45 
15  3  18 
26  31 
47  35 
40  39  38 
25  12 
11  10 
37  46  19 
24  32 
4  13 
41  20  49 
23  0 
33  9 
21  48  31 
22  8  6 
34 

0 
1  2 
3  4 
5  6 
7  8 
9  10 
11  12  13 
14  15  16 
17  18 
19  20  21 
22 
23  24 
 25 
50 
49  48 
47  46  45 
44  43  42 
41  40  39 
38  37  36 
35  34 
33  32 
31  30 
29  28 
27  26 
This completes Part M3 of a 7x7 Magic Square Wheel Spoke Shift method. To see the next 7x7 Part M4.
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Copyright © 2014 by Eddie N Gutierrez. EMail: Fiboguti89@Yahoo.com