The following text is written by Christian Boyer and is coming from his web
site
www.multimagie.com/indexengl.htm
,
Thanks for his authorization to use his text.
Trimagic square, 12ndorder
Walter Trump (Schwabach, 1953  )
The first known order12 trimagic square is owed to the German Walter Trump. The square was found in June 2002. He is "symmetrical" left/right: the ith element of a row + the (13i)th element of this same row = 12*12+ 1 = 145.
June 2002: First known 12thorder trimagic square,
of Walter Trump
1 
22 
33 
41 
62 
66 
79 
83 
104 
112 
123 
144 
9 
119 
45 
115 
107 
93 
52 
38 
30 
100 
26 
136 
75 
141 
35 
48 
57 
14 
131 
88 
97 
110 
4 
70 
74 
8 
106 
49 
12 
43 
102 
133 
96 
39 
137 
71 
140 
101 
124 
42 
60 
37 
108 
85 
103 
21 
44 
5 
122 
76 
142 
86 
67 
126 
19 
78 
59 
3 
69 
23 
55 
27 
95 
135 
130 
89 
56 
15 
10 
50 
118 
90 
132 
117 
68 
91 
11 
99 
46 
134 
54 
77 
28 
13 
73 
64 
2 
121 
109 
32 
113 
36 
24 
143 
81 
72 
58 
98 
84 
116 
138 
16 
129 
7 
29 
61 
47 
87 
80 
34 
105 
6 
92 
127 
18 
53 
139 
40 
111 
65 
51 
63 
31 
20 
25 
128 
17 
120 
125 
114 
82 
94 
The sums of the rows, columns and diagonals are equal to 870. The sums of the squares of the rows, columns and diagonals are equal to 83,810. The sums of the cubes of the rows, columns and diagonals are equal to 9,082,800.
