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A306171
Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
1
21, 237, 252, 1372, 5421, 16195, 53834, 185090, 619073, 2213741, 7903854, 27396112, 97000671, 345456070, 1212355115, 4294891431, 15302228975, 54122847981, 192114679415, 684540291374, 2430461260505, 8640825474293, 30793872853587
OFFSET
1,1
COMMENTS
Column 7 of A306172.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..1..1..1..1. .0..0..0..1..0..0..0. .0..0..0..0..1..0..0
..1..1..1..1..1..1..0. .0..0..0..0..0..0..1. .0..0..0..0..0..0..0
..0..0..1..1..1..0..0. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0
..0..1..1..1..1..1..1. .1..0..0..0..0..0..0. .0..0..0..0..0..0..0
..1..1..1..1..1..1..0. .1..1..0..0..0..0..1. .0..0..0..1..0..0..0
CROSSREFS
Cf. A306172.
Sequence in context: A305346 A316614 A304668 * A316426 A317428 A089937
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 23 2018
STATUS
approved