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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.

A298655 Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 3, 15, 40, 177, 1116, 7964, 89543, 1367704, 32451809, 1028816587
Offset: 1

Views

Author

R. H. Hardin, Jan 24 2018

Keywords

Comments

Diagonal of A298660.

Examples

			Some solutions for n=5
..0..1..0..0..1. .0..0..0..0..0. .0..1..1..1..1. .0..0..0..0..1
..0..1..1..1..0. .1..1..1..1..1. .0..0..1..1..0. .1..1..1..1..1
..0..1..1..1..0. .0..0..0..0..0. .1..1..1..1..0. .0..1..1..0..0
..0..1..0..1..0. .1..1..1..1..1. .1..0..0..0..1. .0..1..1..1..1
..1..0..1..0..1. .0..0..0..0..0. .0..0..0..1..0. .1..1..1..0..0

Crossrefs

Cf. A298660.

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