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.

A207712 Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 0 vertically.

Table of values

n a(n)
1 6
2 36
3 114
4 387
5 1414
6 5302
7 20265
8 78120
9 302850
10 1177545
11 4587102
12 17888094
13 69803695
14 272499292
15 1064042682
16 4155446955
17 16229927982
18 63392825886
19 247616093433
20 967223892240
21 3778165401850
22 14758373590129
23 57649858583478

List of values

[6, 36, 114, 387, 1414, 5302, 20265, 78120, 302850, 1177545, 4587102, 17888094, 69803695, 272499292, 1064042682, 4155446955, 16229927982, 63392825886, 247616093433, 967223892240, 3778165401850, 14758373590129, 57649858583478]

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

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