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.

A208423 Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 1 vertically.

Table of values

n a(n)
1 18
2 324
3 1278
4 10098
5 55404
6 365094
7 2187162
8 13759164
9 84389022
10 524422458
11 3236767200
12 20048681286
13 123951850866
14 767084787144
15 4744724741082
16 29355963846786
17 181601409572100
18 1123505977913586
19 6950462612268942

List of values

[18, 324, 1278, 10098, 55404, 365094, 2187162, 13759164, 84389022, 524422458, 3236767200, 20048681286, 123951850866, 767084787144, 4744724741082, 29355963846786, 181601409572100, 1123505977913586, 6950462612268942]

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

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