A317695 Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

13, 125, 220, 2742, 45681, 585418, 12414382, 278773058, 5491231349, 116715146200, 2570374849303, 54688547721331, 1172271375077821, 25454276497929618, 549001290500006632, 11830194532621287774, 255817531591774568761

Offset

1,1

Comments

Column 6 of A317697.

Links

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

Example

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

Crossrefs

Cf. A317697.

Sequence in context: A305647 A316923 A317041 * A016224 A360437 A278173

Adjacent sequences: A317692 A317693 A317694 * A317696 A317697 A317698

Keyword

nonn

Author

R. H. Hardin, Aug 04 2018

Status

approved