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.

A185821 1/5 the number of n X 5 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Table of values

n a(n)
1 9
2 5680
3 1266624
4 378212944
5 100480040192
6 28043363244452
7 7662203273902712
8 2112817100467905536
9 580282378007177354752
10 159650092398206756238532
11 43890600560593534666234904
12 12070254095603726713513018032

List of values

[9, 5680, 1266624, 378212944, 100480040192, 28043363244452, 7662203273902712, 2112817100467905536, 580282378007177354752, 159650092398206756238532, 43890600560593534666234904, 12070254095603726713513018032]

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

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