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A317812
Number of nX5 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
1, 5, 5, 34, 38, 94, 230, 552, 1397, 3674, 9184, 23878, 60774, 154748, 397244, 1018967, 2615513, 6711959, 17205261, 44124247, 113202760, 290421232, 745101253, 1911622370, 4904294416, 12582199698, 32280536816, 82818477145, 212479820870
OFFSET
1,2
COMMENTS
Column 5 of A317815.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..1..0. .0..1..0..1..0. .0..1..0..0..1. .0..1..1..1..0
..1..0..0..1..0. .1..0..0..1..1. .1..1..1..0..0. .1..0..0..0..1
..0..0..1..1..0. .1..0..1..1..0. .0..1..1..0..1. .0..0..0..0..1
..1..1..1..1..1. .0..1..1..0..0. .0..1..0..0..1. .1..1..1..0..0
..0..0..0..1..0. .0..1..0..0..0. .0..1..0..1..0. .1..1..1..0..1
CROSSREFS
Cf. A317815.
Sequence in context: A270689 A270278 A270725 * A298961 A298721 A299555
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 07 2018
STATUS
approved