A303968 - OEIS

A303968

Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 5 king-move adjacent elements, with upper left element zero.

21, 237, 186, 842, 2247, 6264, 15517, 40239, 101894, 275913, 742329, 1970215, 5207495, 13783510, 36338058, 96289588, 255453841, 676717260, 1792458697, 4748791014, 12573506308, 33301968773, 88224464420, 233692020122

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OFFSET

1,1

COMMENTS

Column 7 of A303969.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303969.

Sequence in context: A069601 A173347 A360854 * A304930 A305346 A316614

Adjacent sequences: A303965 A303966 A303967 * A303969 A303970 A303971

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 03 2018

STATUS

approved