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A304262
Number of nX7 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
1
0, 72, 61, 181, 772, 2516, 10024, 35769, 143364, 546403, 2127606, 8299219, 32202805, 125918125, 490459555, 1914519705, 7464476082, 29134292070, 113630849252, 443388799039, 1729833956517, 6748798176297, 26331366063005, 102730407728899
OFFSET
1,2
COMMENTS
Column 7 of A304263.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..0..1..1..0. .0..0..0..0..1..1..0. .0..1..1..1..1..1..0
..1..1..0..0..0..1..0. .1..1..0..1..0..1..0. .1..1..0..0..0..1..1
..1..0..1..1..1..0..0. .0..1..1..1..0..0..1. .1..0..1..0..1..0..1
..0..0..1..0..0..1..0. .1..1..0..1..0..1..0. .0..0..1..1..1..0..0
..1..1..0..0..1..1..0. .0..0..0..0..1..1..0. .1..0..1..0..1..0..1
CROSSREFS
Cf. A304263.
Sequence in context: A347918 A035879 A033392 * A110678 A008943 A003898
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 09 2018
STATUS
approved