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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.

A269337 Number of 3Xn arrays containing n copies of 0..3-1 avoiding the pattern equal-up in every row and column.

Table of values

n a(n)
1 6
2 74
3 852
4 10210
5 124466
6 1539739
7 19271229
8 243392830
9 3095718114
10 39591108117
11 508549674595
12 6555349397662
13 84743875128342
14 1098136390356477
15 14258478535216226
16 185450173389172712
17 2415532450075364094

List of values

[6, 74, 852, 10210, 124466, 1539739, 19271229, 243392830, 3095718114, 39591108117, 508549674595, 6555349397662, 84743875128342, 1098136390356477, 14258478535216226, 185450173389172712, 2415532450075364094]

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

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