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A297865
Number of nX7 0..1 arrays with every element equal to 2, 3 or 4 king-move adjacent elements, with upper left element zero.
1
0, 54, 820, 5774, 174970, 3740362, 76517448, 1699781649, 36000744495, 782045113085, 16877012899377, 363771158498502, 7861206400229573, 169677704706722960, 3663241783403069590, 79092902173616439078
OFFSET
1,2
COMMENTS
Column 7 of A297866.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..1..1..0..0. .0..0..1..1..1..1..0. .0..0..0..0..1..1..0
..0..1..0..0..0..1..0. .0..1..1..0..1..0..0. .0..1..1..0..1..0..0
..0..1..1..0..1..1..1. .0..1..0..0..0..1..0. .0..1..1..0..1..0..0
..0..0..1..0..1..0..0. .0..1..1..0..1..1..0. .0..1..0..0..1..1..0
..0..1..1..0..0..0..0. .0..0..1..1..1..0..0. .0..0..1..1..0..0..0
CROSSREFS
Cf. A297866.
Sequence in context: A093972 A281775 A344272 * A298132 A008401 A247048
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 07 2018
STATUS
approved