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.

A302221 Number of n X 5 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 3
2 146
3 760
4 6110
5 40395
6 292781
7 2043848
8 14419536
9 101511446
10 713030990
11 5019470018
12 35283108018
13 248180957058
14 1745222920651
15 12274305388046
16 86321053540385
17 607085317234430
18 4269538885720366
19 30026989609915629

List of values

[3, 146, 760, 6110, 40395, 292781, 2043848, 14419536, 101511446, 713030990, 5019470018, 35283108018, 248180957058, 1745222920651, 12274305388046, 86321053540385, 607085317234430, 4269538885720366, 30026989609915629]

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

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