A297865 Number of nX7 0..1 arrays with every element equal to 2, 3 or 4 king-move adjacent elements, with upper left element zero.

0, 54, 820, 5774, 174970, 3740362, 76517448, 1699781649, 36000744495, 782045113085, 16877012899377, 363771158498502, 7861206400229573, 169677704706722960, 3663241783403069590, 79092902173616439078

Offset

1,2

Comments

Column 7 of A297866.

Links

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

Example

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

Crossrefs

Cf. A297866.

Sequence in context: A093972 A281775 A344272 * A298132 A008401 A247048

Adjacent sequences: A297862 A297863 A297864 * A297866 A297867 A297868

Keyword

nonn

Author

R. H. Hardin, Jan 07 2018

Status

approved