A316517 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 7 or 8 king-move adjacent elements, with upper left element zero.

64, 719, 1002, 4894, 48677, 432088, 3646656, 32938897, 290133839, 2562456375, 22728069640, 201003310339, 1779143777742, 15749640647849, 139387918052540, 1233758985418234, 10920131413523623, 96653911737990883, 855492234969744992

Offset

1,1

Comments

Column 7 of A316518.

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

Crossrefs

Cf. A316518.

Sequence in context: A303726 A305229 A304774 * A304471 A316288 A306052

Adjacent sequences: A316514 A316515 A316516 * A316518 A316519 A316520

Keyword

nonn

Author

R. H. Hardin, Jul 05 2018

Status

approved