A304550 - OEIS

A304550

Number of n X 7 0..1 arrays with every element unequal to 0, 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

1, 908, 2822, 72713, 1061345, 16063367, 274090332, 4486557450, 72881502770, 1210303857062, 19895930906948, 327540952049656, 5404014762291029, 89033985729142356, 1467427990298534936, 24190936987126912330

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OFFSET

1,2

COMMENTS

Column 7 of A304551.

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

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

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

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

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

CROSSREFS

Cf. A304551.

Sequence in context: A305280 A304893 A316575 * A316375 A306135 A317270

Adjacent sequences: A304547 A304548 A304549 * A304551 A304552 A304553

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 14 2018

STATUS

approved