A302420 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 2785, 4754, 12442, 69537, 518736, 2342685, 10963076, 58365289, 307637792, 1559714448, 8017915598, 41579079715, 214421759223, 1104296541035, 5698818950760, 29408079178051, 151670498894737, 782355792604657

Offset

1,1

Comments

Row 7 of A302415.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A302415.

Sequence in context: A302068 A281475 A302628 * A303187 A302328 A303021

Adjacent sequences: A302417 A302418 A302419 * A302421 A302422 A302423

Keyword

nonn

Author

R. H. Hardin, Apr 07 2018

Status

approved