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.

A180764 Half the number of nX4 binary arrays with each element equal to at least one neighbor.

Table of values

n a(n)
1 2
2 34
3 390
4 4475
5 52186
6 606546
7 7053923
8 82032712
9 953982820
10 11094190209
11 129018028226
12 1500393683522
13 17448578663219
14 202915341402216
15 2359770191311572
16 27442554696574793
17 319138622503858354

List of values

[2, 34, 390, 4475, 52186, 606546, 7053923, 82032712, 953982820, 11094190209, 129018028226, 1500393683522, 17448578663219, 202915341402216, 2359770191311572, 27442554696574793, 319138622503858354]

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

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