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.

A180758 Half the number of nX9 binary arrays with each element equal to at least two neighbors.

Table of values

n a(n)
1 0
2 21
3 67
4 2059
5 41755
6 986376
7 22238670
8 514990479
9 11843513563
10 273193577866
11 6295815062637
12 145178091690740
13 3347707869286493
14 77204310077778551
15 1780484848971706031
16 41062118413701907548
17 946988189894419322573

List of values

[0, 21, 67, 2059, 41755, 986376, 22238670, 514990479, 11843513563, 273193577866, 6295815062637, 145178091690740, 3347707869286493, 77204310077778551, 1780484848971706031, 41062118413701907548, 946988189894419322573]

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

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