A302669 Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

8, 1934, 15569, 251254, 3204956, 46360666, 637088915, 8880747825, 123521424862, 1717557375519, 23910961429217, 332517383714540, 4627380566545690, 64369973050145418, 895641924918067374, 12460311385203779872

Offset: 1

Author

R. H. Hardin, Apr 11 2018

Keywords

• nonn

Comments

Column 7 of A302670.

Examples

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

Links

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

Crossrefs

Cf. A302670.