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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.

A239816 Number of nX5 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it, modulo 4.

Table of values

n a(n)
1 56
2 3951
3 232272
4 14544801
5 884977259
6 54668820459
7 3347474694032
8 205970817822022
9 12641836066488239
10 776862587801118702
11 47711236158517841564
12 2931070666588302434209
13 180038209753070897538954

List of values

[56, 3951, 232272, 14544801, 884977259, 54668820459, 3347474694032, 205970817822022, 12641836066488239, 776862587801118702, 47711236158517841564, 2931070666588302434209, 180038209753070897538954]

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

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