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.

A207880 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 1 0 vertically.

Table of values

n a(n)
1 2
2 16
3 82
4 575
5 4387
6 33631
7 618202
8 12501427
9 214612008
10 11062960730
11 657453772615
12 25402400315447
13 3733312830860298
14 643896610977129232
15 54640540348513184649
16 23181398334398528895458
17 11714931649831496203623180

List of values

[2, 16, 82, 575, 4387, 33631, 618202, 12501427, 214612008, 11062960730, 657453772615, 25402400315447, 3733312830860298, 643896610977129232, 54640540348513184649, 23181398334398528895458, 11714931649831496203623180]

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

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