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.

A207708 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 0 vertically.

Table of values

n a(n)
1 14
2 196
3 966
4 4761
5 32775
6 225625
7 1369900
8 8317456
9 52895444
10 336392281
11 2102483853
12 13140724689
13 82666212354
14 520040015044
15 3263532374278
16 20480430831961
17 128643137927197
18 808042422131569
19 5073797510995256

List of values

[14, 196, 966, 4761, 32775, 225625, 1369900, 8317456, 52895444, 336392281, 2102483853, 13140724689, 82666212354, 520040015044, 3263532374278, 20480430831961, 128643137927197, 808042422131569, 5073797510995256]

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

Content is available under The OEIS End-User License Agreement.