cp's OEIS Frontend

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.

A221251 Number of nX4 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2.

Table of values

n a(n)
1 4
2 81
3 2116
4 58081
5 1612900
6 44903401
7 1250753956
8 34842328921
9 970622980804
10 27039303204489
11 753252725702500
12 20983889126032561
13 584562920742585316
14 16284579460194091201
15 453650957002812576484
16 12637673040690140943889

List of values

[4, 81, 2116, 58081, 1612900, 44903401, 1250753956, 34842328921, 970622980804, 27039303204489, 753252725702500, 20983889126032561, 584562920742585316, 16284579460194091201, 453650957002812576484, 12637673040690140943889]

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

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