A302384 Number of 5Xn 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 111, 2771, 48980, 1089035, 24209608, 535192095, 11837195381, 261930946428, 5795956434998, 128249104063760, 2837819642235388, 62793689084100491, 1389463440460469952, 30745265560214208511, 680313952713083139457

Offset

1,2

Comments

Row 5 of A302381.

Links

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

Example

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

Crossrefs

Cf. A302381.

Sequence in context: A250145 A075859 A264466 * A303105 A008396 A332950

Adjacent sequences: A302381 A302382 A302383 * A302385 A302386 A302387

Keyword

nonn

Author

R. H. Hardin, Apr 06 2018

Status

approved