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.

A207437 Number of n X 3 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.

Table of values

n a(n)
1 6
2 36
3 108
4 333
5 1144
6 4048
7 14743
8 54250
9 201098
10 747683
11 2785178
12 10383774
13 38732585
14 144511028
15 539243500
16 2012324661
17 7509786472
18 28026278000
19 104594259855
20 390348614698
21 1456795959866
22 5436826706395
23 20290493971290

List of values

[6, 36, 108, 333, 1144, 4048, 14743, 54250, 201098, 747683, 2785178, 10383774, 38732585, 144511028, 539243500, 2012324661, 7509786472, 28026278000, 104594259855, 390348614698, 1456795959866, 5436826706395, 20290493971290]

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

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