A302531 Number of 5Xn 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 61, 497, 902, 3683, 23909, 128242, 465323, 1918153, 10153650, 48825739, 206962001, 913773720, 4366054069, 20367538805, 90798363146, 409867362675, 1900191504221, 8749921654714, 39674026618581, 180520404483627

Offset

1,2

Comments

Row 5 of A302528.

Links

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

Example

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

Crossrefs

Cf. A302528.

Sequence in context: A142034 A338102 A167445 * A061002 A303412 A209548

Adjacent sequences: A302528 A302529 A302530 * A302532 A302533 A302534

Keyword

nonn

Author

R. H. Hardin, Apr 09 2018

Status

approved