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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.

A047937 Number of 2-colorings of an n X n grid, up to rotational symmetry.

Table of values

n a(n)
0 1
1 2
2 6
3 140
4 16456
5 8390720
6 17179934976
7 140737496748032
8 4611686019501162496
9 604462909807864344215552
10 316912650057057631849169289216
11 664613997892457937028364283517337600
12 5575186299632655785385110159782842147536896
13 187072209578355573530071668259090783437390809661440

List of values

[1, 2, 6, 140, 16456, 8390720, 17179934976, 140737496748032, 4611686019501162496, 604462909807864344215552, 316912650057057631849169289216, 664613997892457937028364283517337600, 5575186299632655785385110159782842147536896, 187072209578355573530071668259090783437390809661440]

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

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