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.

A207780 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 0 1 vertically.

Table of values

n a(n)
1 2
2 16
3 98
4 791
5 6766
6 65094
7 786907
8 9855231
9 142116676
10 2459545057
11 46309750425
12 999589825419
13 26202502382134
14 768926273969151
15 25878896800392858
16 1098191860946291476
17 52205734467966457603
18 2867736141204451650414

List of values

[2, 16, 98, 791, 6766, 65094, 786907, 9855231, 142116676, 2459545057, 46309750425, 999589825419, 26202502382134, 768926273969151, 25878896800392858, 1098191860946291476, 52205734467966457603, 2867736141204451650414]

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

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