A305279 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero.

1, 272, 256, 2130, 5060, 26577, 96739, 437098, 1790654, 7846313, 33489668, 146020567, 632928299, 2759573954, 12031721087, 52517794501, 229550541255, 1003154198402, 4390141774803, 19203048654511, 84095708519850

Offset

1,2

Comments

Column 6 of A305281.

Links

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

Example

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

Crossrefs

Cf. A305281.

Sequence in context: A332978 A214012 A303886 * A005933 A112820 A304892

Adjacent sequences: A305276 A305277 A305278 * A305280 A305281 A305282

Keyword

nonn

Author

R. H. Hardin, May 29 2018

Status

approved