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A306052
Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.
1
64, 719, 3826, 22446, 321707, 3914486, 36596835, 458669749, 5842600934, 66568698945, 798332516282, 9821492891496, 117262506186344, 1405851087491116, 17027654495622693, 205003745530369522, 2465103157587732737
OFFSET
1,1
COMMENTS
Column 7 of A306053.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..1..1..1..0. .0..0..1..1..1..0..1. .0..0..1..1..0..1..1
..0..0..1..1..1..0..1. .0..0..0..1..1..0..0. .0..0..0..1..0..0..1
..0..0..1..1..1..0..1. .0..1..1..1..1..1..1. .0..0..0..0..0..0..0
..0..0..1..1..1..1..1. .0..1..0..1..1..0..1. .0..1..1..0..0..1..1
..0..0..1..1..1..1..1. .0..0..0..1..1..1..0. .0..0..0..0..0..1..0
CROSSREFS
Cf. A306053.
Sequence in context: A316517 A304471 A316288 * A317229 A008513 A321830
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 18 2018
STATUS
approved