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.

A268623 Number of n X 3 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two no more than once.

Table of values

n a(n)
1 24
2 174
3 1086
4 6300
5 34890
6 187224
7 982086
8 5063964
9 25764066
10 129678528
11 646978302
12 3204131172
13 15769455258
14 77195600520
15 376136512950
16 1825265294892
17 8825528262738
18 42536536932432
19 204425809550958
20 979908028544244

List of values

[24, 174, 1086, 6300, 34890, 187224, 982086, 5063964, 25764066, 129678528, 646978302, 3204131172, 15769455258, 77195600520, 376136512950, 1825265294892, 8825528262738, 42536536932432, 204425809550958, 979908028544244]

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

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