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.

A285745 Number of n X 3 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.

Table of values

n a(n)
1 1
2 8
3 105
4 550
5 5105
6 30918
7 265920
8 1773432
9 14632372
10 103605826
11 834224969
12 6128787272
13 48666035225
14 365893476096
15 2883831290602
16 22005412864334
17 172812531531152
18 1331535174196624
19 10442072847350585
20 80985489140322402

List of values

[1, 8, 105, 550, 5105, 30918, 265920, 1773432, 14632372, 103605826, 834224969, 6128787272, 48666035225, 365893476096, 2883831290602, 22005412864334, 172812531531152, 1331535174196624, 10442072847350585, 80985489140322402]

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

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