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.

A303308 Number of n X n 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

1, 3, 12, 36, 139, 1221, 26184, 746323, 23967605, 1285074158, 140135122490, 23444843868325, 5152091496332058, 1785689257359207106, 1097023324108868377427, 1066418515771155179484946
Offset: 1

Views

Author

R. H. Hardin, Apr 21 2018

Keywords

Comments

Diagonal of A303314.

Examples

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

Crossrefs

Cf. A303314.