A303885 Number of nX5 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

1, 82, 87, 487, 1150, 4964, 16431, 68704, 254498, 1032541, 4015135, 16141725, 63833719, 255591521, 1017154228, 4066483674, 16219083721, 64801161878, 258673696618, 1033238759163, 4125754161505, 16478213040025, 65805525362999

Offset

1,2

Comments

Column 5 of A303888.

Links

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

Example

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

Crossrefs

Cf. A303888.

Sequence in context: A181468 A081648 A281921 * A305278 A025370 A282114

Adjacent sequences: A303882 A303883 A303884 * A303886 A303887 A303888

Keyword

nonn

Author

R. H. Hardin, May 02 2018

Status

approved