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.

A283569 Number of nX5 0..1 arrays with no 1 equal to more than one of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element.

Table of values

n a(n)
1 5
2 282
3 4313
4 67892
5 945100
6 12699250
7 164714523
8 2089140956
9 26034179747
10 320066184088
11 3892257109768
12 46912556808052
13 561231923565665
14 6671995763846662
15 78889299491699749
16 928412437363667396

List of values

[5, 282, 4313, 67892, 945100, 12699250, 164714523, 2089140956, 26034179747, 320066184088, 3892257109768, 46912556808052, 561231923565665, 6671995763846662, 78889299491699749, 928412437363667396]

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

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