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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.

A221897 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.

Table of values

n a(n)
1 28
2 19408
3 7235107
4 2815434576
5 1093046005330
6 424750933848720
7 164973176599593177
8 64079516472337724523
9 24889801648272710871176
10 9667694294893797006224411
11 3755123558818256978843191913

List of values

[28, 19408, 7235107, 2815434576, 1093046005330, 424750933848720, 164973176599593177, 64079516472337724523, 24889801648272710871176, 9667694294893797006224411, 3755123558818256978843191913]

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

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