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.

A269137 Number of n X 2 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three no more than once.

Table of values

n a(n)
1 16
2 148
3 1164
4 8532
5 59916
6 408596
7 2727564
8 17914580
9 116170764
10 745617300
11 4745165964
12 29984668756
13 188330955276
14 1176750424852
15 7319499656844
16 45347466532308
17 279961285570572
18 1722988944076436
19 10574188575966348

List of values

[16, 148, 1164, 8532, 59916, 408596, 2727564, 17914580, 116170764, 745617300, 4745165964, 29984668756, 188330955276, 1176750424852, 7319499656844, 45347466532308, 279961285570572, 1722988944076436, 10574188575966348]

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

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