A concentric magic square is nice. A concentric magic square with diamond is even better; see i.e. the 15x15 Al Antaakii concentric magic square with diamond. In the diamond are alle odd numbers (and outside the diamond are the even numbers).
How to construct a concentric magic square with diamond? Puzzle in EXCEL and see the result below:
11x11 concentric magic square with diamond
116 |
84 |
26 |
118 |
10 |
23 |
102 |
14 |
24 |
78 |
76 |
28 |
80 |
34 |
50 |
7 |
103 |
9 |
106 |
68 |
92 |
94 |
32 |
114 |
100 |
13 |
17 |
97 |
93 |
89 |
18 |
8 |
90 |
82 |
120 |
15 |
79 |
71 |
41 |
39 |
75 |
107 |
2 |
40 |
36 |
5 |
121 |
49 |
55 |
69 |
59 |
73 |
1 |
117 |
86 |
95 |
119 |
21 |
45 |
65 |
61 |
57 |
77 |
101 |
3 |
27 |
48 |
11 |
31 |
85 |
63 |
53 |
67 |
37 |
91 |
111 |
74 |
70 |
58 |
35 |
47 |
51 |
81 |
83 |
43 |
87 |
64 |
52 |
56 |
12 |
104 |
109 |
105 |
25 |
29 |
33 |
22 |
110 |
66 |
62 |
30 |
88 |
72 |
115 |
19 |
113 |
16 |
54 |
42 |
60 |
46 |
38 |
96 |
4 |
112 |
99 |
20 |
108 |
98 |
44 |
6 |
Puzzle yourself using the EXCEL download below.