A304477 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

32, 184, 202, 869, 2870, 11079, 35462, 133597, 471114, 1710896, 6061565, 21980834, 78585187, 283683806, 1018847251, 3672874235, 13208879435, 47594094190, 171327070438, 617223088503, 2222719304061, 8007207853534, 28840761497354

Offset

1,1

Comments

Column 6 of A304479.

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..1..1..1. .0..1..0..1..0..0. .0..1..1..1..0..1
..0..1..0..0..0..0. .0..1..1..1..1..1. .0..0..1..1..1..1. .0..1..1..1..1..0
..1..0..1..0..1..1. .1..1..1..1..1..1. .0..1..1..1..1..1. .0..0..1..1..1..1
..1..1..1..1..0..0. .0..1..1..1..1..1. .1..0..1..1..1..0. .0..1..0..1..1..1
..1..1..1..1..1..1. .1..0..1..0..0..1. .1..1..0..1..0..1. .1..0..0..0..0..1

Crossrefs

Cf. A304479.

Sequence in context: A370649 A303798 A305243 * A316302 A165002 A165010

Adjacent sequences: A304474 A304475 A304476 * A304478 A304479 A304480

Keyword

nonn

Author

R. H. Hardin, May 13 2018

Status

approved