A298915 Number of nX6 0..1 arrays with every element equal to 0, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 5, 5, 6, 9, 14, 24, 44, 81, 156, 306, 602, 1192, 2370, 4720, 9415, 18797, 37547, 75032, 149981, 299846, 599534, 1198852, 2397405, 4794400, 9588236, 19175692, 38350310, 76699140, 153396236, 306789653, 613575417, 1227145465, 2454283522, 4908556821

Offset: 1

Author

R. H. Hardin, Jan 29 2018

Keywords

• nonn

Comments

Column 6 of A298917.

Examples

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

Links

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

Crossrefs

Cf. A298917.

Formula

Empirical: a(n) = 3*a(n-1) -2*a(n-2) +a(n-3) -2*a(n-4) -a(n-7) +2*a(n-8) for n>9