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.

A207777 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically.

Table of values

n a(n)
1 31
2 961
3 2040
4 20104
5 157472
6 759482
7 6513576
8 49975640
9 259077468
10 2150453548
11 15981869071
12 87310201135
13 709311394273
14 5137197417469
15 29284543214864
16 233502033554208
17 1657717100658198
18 9791967204391982
19 76739391151731042

List of values

[31, 961, 2040, 20104, 157472, 759482, 6513576, 49975640, 259077468, 2150453548, 15981869071, 87310201135, 709311394273, 5137197417469, 29284543214864, 233502033554208, 1657717100658198, 9791967204391982, 76739391151731042]

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

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