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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.

A222017 Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.

Table of values

n a(n)
1 13
2 1363
3 86088
4 5925053
5 403317044
6 27460842224
7 1870475750419
8 127385479747138
9 8675741759311142
10 590866503322144180
11 40241368935424750183
12 2740665723881270704902
13 186654894043998446085330

List of values

[13, 1363, 86088, 5925053, 403317044, 27460842224, 1870475750419, 127385479747138, 8675741759311142, 590866503322144180, 40241368935424750183, 2740665723881270704902, 186654894043998446085330]

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

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