A300643 Number of nX5 0..1 arrays with every element equal to 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 9, 30, 316, 2998, 28089, 268615, 2552014, 24338903, 231985285, 2211326264, 21081277233, 200957956858, 1915723519711, 18262175095417, 174090604742721, 1659575837493437, 15820464143773812, 150813856777262673

Offset

1,2

Comments

Column 5 of A300646.

Links

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

Example

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

Crossrefs

Cf. A300646.

Sequence in context: A319839 A274998 A000440 * A161684 A294404 A298587

Adjacent sequences: A300640 A300641 A300642 * A300644 A300645 A300646

Keyword

nonn

Author

R. H. Hardin, Mar 10 2018

Status

approved