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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.

A295197 Triangle read by rows: T(n,k) is the number of non-isomorphic colorings of a toroidal n X k grid using any number of swappable colors, 1 <= k <= n.

Table of values

n a(n)
1 1
2 2
3 9
4 3
5 43
6 2387
7 7
8 587
9 351773
10 655089857
11 12
12 11703
13 92197523
14 2586209749712
15 185543613289205809
16 43
17 352902
18 37893376167
19 18581620064907130
20 28224967150633208580385
21 106103186941524316132396201360
22 127
23 13639372
24 22612848403571
25 220019264470242220839
26 8045720086273150473238405274
27 851013076163633746725692124186472539
28 218900758256599151027392153440612298654753249

List of values

[1, 2, 9, 3, 43, 2387, 7, 587, 351773, 655089857, 12, 11703, 92197523, 2586209749712, 185543613289205809, 43, 352902, 37893376167, 18581620064907130, 28224967150633208580385, 106103186941524316132396201360, 127, 13639372, 22612848403571, 220019264470242220839, 8045720086273150473238405274, 851013076163633746725692124186472539, 218900758256599151027392153440612298654753249]

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

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