A306127 Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

13, 61, 73, 360, 1351, 4872, 21926, 106322, 512165, 2629638, 13873297, 73471599, 392491829, 2118534278, 11466963266, 62147643139, 337671074172, 1837129443591, 9999348582462, 54454828146544, 296687232238381, 1616765676240054

Offset

1,1

Comments

Column 6 of A306129.

Links

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

Example

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

Crossrefs

Cf. A306129.

Sequence in context: A359666 A217606 A002647 * A118711 A316309 A317264

Adjacent sequences: A306124 A306125 A306126 * A306128 A306129 A306130

Keyword

nonn

Author

R. H. Hardin, Jun 22 2018

Status

approved