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A318421
Number of nX6 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
1, 10, 8, 126, 280, 783, 2489, 9381, 35283, 124358, 433497, 1542555, 5562368, 20097597, 72352461, 259359679, 929755795, 3339985609, 12012273545, 43189126852, 155189811798, 557528400977, 2003243107506, 7199140751592
OFFSET
1,2
COMMENTS
Column 6 of A318423.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..0..1..0. .0..1..0..0..0..0. .0..1..1..0..1..0. .0..1..0..0..1..1
..1..1..1..1..1..1. .1..1..1..1..1..1. .1..0..0..1..1..0. .1..0..1..0..1..1
..0..0..1..0..1..0. .0..0..1..1..1..0. .0..0..1..0..1..1. .0..0..0..0..0..0
..0..0..1..1..0..0. .0..0..1..1..0..0. .1..1..1..1..1..0. .1..1..0..1..0..1
..0..0..1..0..0..0. .0..0..1..0..0..0. .0..0..0..1..0..0. .1..1..0..0..1..1
CROSSREFS
Cf. A318423.
Sequence in context: A213553 A317813 A038310 * A280902 A118768 A318255
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 26 2018
STATUS
approved