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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.

A266457 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north neighbor modulo 4 and the upper left element equal to 0.

Table of values

n a(n)
1 2
2 101
3 6152
4 442285
5 34667512
6 2875874396
7 248188720768
8 22053860939581
9 2004232543930760
10 185418855352374916
11 17404087748977051168
12 1653341486254703216284
13 158659220471195369806688

List of values

[2, 101, 6152, 442285, 34667512, 2875874396, 248188720768, 22053860939581, 2004232543930760, 185418855352374916, 17404087748977051168, 1653341486254703216284, 158659220471195369806688]

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

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