A305278 Number of nX5 0..1 arrays with every element unequal to 0, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero.

1, 82, 87, 487, 1185, 5060, 17335, 73058, 275241, 1135214, 4474141, 18272560, 73232230, 297696906, 1201098907, 4872144375, 19707171814, 79868387402, 323359088801, 1310050602370, 5305691918957, 21492812038683, 87055596884440

Offset

1,2

Comments

Column 5 of A305281.

Links

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

Example

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

Crossrefs

Cf. A305281.

Sequence in context: A081648 A281921 A303885 * A025370 A282114 A099067

Adjacent sequences: A305275 A305276 A305277 * A305279 A305280 A305281

Keyword

nonn

Author

R. H. Hardin, May 29 2018

Status

approved