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A298581
Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
1
8, 99, 261, 2551, 14482, 90381, 708805, 4703257, 33115108, 242951715, 1717346931, 12261739261, 88279587687, 632361868337, 4531624593058, 32509115649588, 233191927798253, 1672553903049280, 11995741170036801, 86046219903357310
OFFSET
1,1
COMMENTS
Column 7 of A298582.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..0..0..0..1. .0..1..1..0..1..0..0. .0..1..1..0..1..1..1
..0..1..0..0..0..1..1. .0..1..0..0..1..0..1. .0..0..1..0..1..0..1
..1..1..0..0..0..0..0. .1..1..0..0..0..0..1. .1..1..1..1..1..0..0
..0..0..0..1..0..1..0. .1..1..0..0..0..0..0. .0..0..1..1..1..0..0
..1..1..0..1..0..1..1. .1..0..1..1..1..1..1. .0..1..1..1..0..1..0
CROSSREFS
Cf. A298582.
Sequence in context: A159232 A297958 A298774 * A299573 A298395 A299513
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 22 2018
STATUS
approved