cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A271021 Magic sums of 3 X 3 semimagic squares of squares whose rows, columns, and at least one of the two main diagonals sum to the same number.

Table of values

n a(n)
1 21609
2 86436
3 194481
4 257049
5 345744
6 540225
7 777924
8 1028196
9 1058841
10 1172889
11 1382976
12 1750329
13 2160900
14 2313441
15 2614689
16 3111696
17 3651921
18 4112784
19 4235364
20 4691556
21 4862025
22 5531904
23 6245001
24 6426225
25 7001316
26 7800849
27 8311689
28 8643600
29 9253764
30 9529569

List of values

[21609, 86436, 194481, 257049, 345744, 540225, 777924, 1028196, 1058841, 1172889, 1382976, 1750329, 2160900, 2313441, 2614689, 3111696, 3651921, 4112784, 4235364, 4691556, 4862025, 5531904, 6245001, 6426225, 7001316, 7800849, 8311689, 8643600, 9253764, 9529569]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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