A302958 Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 1172, 164916, 12365841, 1212025201, 130376252119, 13578993819785, 1403559107071889, 145479455454006812, 15089882967228651401, 1564791955810116030473, 162255388684026120105462

Offset

1,2

Comments

Row 7 of A302953.

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
..0..0..0..0..0. .0..0..0..1..0. .0..0..0..1..0. .0..0..0..1..0
..0..0..1..1..0. .0..0..1..0..0. .0..0..1..1..0. .0..0..1..1..0
..0..0..0..0..0. .0..0..1..0..0. .0..0..0..0..0. .0..0..0..0..1
..0..1..0..0..0. .1..1..1..1..1. .0..1..1..0..0. .0..1..0..0..0
..0..0..1..1..0. .0..1..1..0..1. .1..0..1..0..1. .1..1..1..0..0
..1..1..1..0..0. .1..0..1..0..0. .1..1..1..1..1. .1..1..0..1..1

Crossrefs

Cf. A302953.

Sequence in context: A230738 A302386 A303107 * A232082 A187725 A269958

Adjacent sequences: A302955 A302956 A302957 * A302959 A302960 A302961

Keyword

nonn

Author

R. H. Hardin, Apr 16 2018

Status

approved