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.

A220998 Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor.

Table of values

n a(n)
1 8
2 306
3 11017
4 394580
5 14113081
6 504635391
7 18042682111
8 645084293748
9 23063745428252
10 824598809224499
11 29481898439700635
12 1054066854447577743
13 37686070858394633616
14 1347390750744270331311
15 48173285030655948141067

List of values

[8, 306, 11017, 394580, 14113081, 504635391, 18042682111, 645084293748, 23063745428252, 824598809224499, 29481898439700635, 1054066854447577743, 37686070858394633616, 1347390750744270331311, 48173285030655948141067]

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

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