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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.

A222439 Number of n X 3 0..3 arrays with entries increasing mod 4 by 0, 1 or 2 rightwards and downwards, starting with upper left zero.

Table of values

n a(n)
1 9
2 147
3 2403
4 39285
5 642249
6 10499787
7 171655443
8 2806303725
9 45878770089
10 750047661027
11 12262131106083
12 200467073061765
13 3277329775247529
14 53579324981787867
15 875939945740498323
16 14320277248820697405

List of values

[9, 147, 2403, 39285, 642249, 10499787, 171655443, 2806303725, 45878770089, 750047661027, 12262131106083, 200467073061765, 3277329775247529, 53579324981787867, 875939945740498323, 14320277248820697405]

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

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