A304261 Number of nX6 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

0, 33, 26, 88, 230, 925, 2516, 8248, 27317, 89074, 287896, 945232, 3089403, 10093067, 33056134, 108135876, 354125720, 1159096064, 3795435852, 12426659094, 40688258392, 133217543175, 436196336127, 1428218527996, 4676315545330

Offset

1,2

Comments

Column 6 of A304263.

Links

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

Example

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

Crossrefs

Cf. A304263.

Sequence in context: A192631 A104781 A159001 * A022989 A023475 A067011

Adjacent sequences: A304258 A304259 A304260 * A304262 A304263 A304264

Keyword

nonn

Author

R. H. Hardin, May 09 2018

Status

approved