A302361 - OEIS

A302361

Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 2, 31, 77, 6580, 330505, 188443738, 169314399506, 675015247638492

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OFFSET

1,2

COMMENTS

Diagonal of A302367.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

..0..1..1..0..0. .0..1..1..0..0. .0..0..0..0..0. .0..0..1..1..0

..1..1..0..0..1. .0..1..1..0..0. .1..0..1..0..0. .0..0..1..1..1

..0..1..0..0..0. .1..1..1..0..1. .0..0..1..0..1. .0..0..1..1..0

..1..1..1..0..1. .0..1..1..0..0. .0..0..1..0..0. .1..0..0..1..1

..1..1..1..0..1. .1..1..0..0..1. .1..0..0..0..0. .0..0..1..1..0

CROSSREFS

Cf. A302367.

Sequence in context: A105757 A091252 A031920 * A175446 A054207 A104095

Adjacent sequences: A302358 A302359 A302360 * A302362 A302363 A302364

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 06 2018

STATUS

approved