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.

A231765 Number of (1+1) X (n+1) 0..1 arrays with no element having a strict majority of its horizontal, diagonal and antidiagonal neighbors equal to one.

Table of values

n a(n)
1 9
2 33
3 100
4 315
5 961
6 3024
7 9409
8 29319
9 91204
10 284279
11 885481
12 2758192
13 8590761
14 26760591
15 83356900
16 259648623
17 808776721
18 2519272112
19 7847302225
20 24443615655
21 76139572356
22 237167776135
23 738755721081
24 2301155717168
25 7167887098681

List of values

[9, 33, 100, 315, 961, 3024, 9409, 29319, 91204, 284279, 885481, 2758192, 8590761, 26760591, 83356900, 259648623, 808776721, 2519272112, 7847302225, 24443615655, 76139572356, 237167776135, 738755721081, 2301155717168, 7167887098681]

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

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