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.

A221126 Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor.

Table of values

n a(n)
1 1
2 21
3 200
4 1950
5 19005
6 185164
7 1803949
8 17574675
9 171218008
10 1668058947
11 16250746331
12 158319795778
13 1542400400537
14 15026541578483
15 146393213915408
16 1426207951308175
17 13894558811577567
18 135365087812821450

List of values

[1, 21, 200, 1950, 19005, 185164, 1803949, 17574675, 171218008, 1668058947, 16250746331, 158319795778, 1542400400537, 15026541578483, 146393213915408, 1426207951308175, 13894558811577567, 135365087812821450]

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

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