A302533 Number of 7 X n 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, 421, 9091, 15852, 92603, 1551340, 16130212, 82774516, 506265517, 5660323142, 51739325680, 335761691745, 2418466197168, 21927716125718, 184725699865822, 1350254421406010, 10284927374810243, 86141789798720948, 701278900747323768

Offset

1,2

Comments

Row 7 of A302528.

Links

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

Example

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

Crossrefs

Cf. A302528.

Sequence in context: A353045 A302732 A251198 * A303414 A242149 A083193

Adjacent sequences: A302530 A302531 A302532 * A302534 A302535 A302536

Keyword

nonn

Author

R. H. Hardin, Apr 09 2018

Status

approved