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.

A183477 Number of nX3 0..2 arrays with every element equal to either the sum mod 3 of its vertical neighbors or the sum mod 3 of its horizontal neighbors.

Table of values

n a(n)
1 5
2 39
3 117
4 587
5 2925
6 12131
7 58333
8 270611
9 1220877
10 5724163
11 26403017
12 121544939
13 564597457
14 2608586447
15 12062272841
16 55880316803
17 258485374601
18 1196311279235
19 5538446306557
20 25631318490835
21 118643423750561
22 549199683026799

List of values

[5, 39, 117, 587, 2925, 12131, 58333, 270611, 1220877, 5724163, 26403017, 121544939, 564597457, 2608586447, 12062272841, 55880316803, 258485374601, 1196311279235, 5538446306557, 25631318490835, 118643423750561, 549199683026799]

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

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