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A298666
Number of nX7 0..1 arrays with every element equal to 0, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
1
1, 8, 7, 13, 84, 238, 978, 3895, 11843, 49752, 184380, 640323, 2550161, 9291605, 34411340, 132207077, 488538547, 1844610495, 6998077491, 26247637676, 99671069188, 378042682211, 1432299046200, 5458358304491, 20789207845451
OFFSET
1,2
COMMENTS
Column 7 of A298667.
LINKS
EXAMPLE
Some solutions for n=8
..0..1..1..1..1..1..0. .0..1..0..1..0..1..0. .0..0..1..0..0..0..0
..1..1..1..0..0..1..1. .1..1..1..1..1..1..1. .0..0..0..0..1..0..0
..0..1..1..0..0..0..1. .1..1..1..1..1..1..1. .0..1..0..0..0..0..1
..1..1..0..0..0..0..1. .0..1..1..0..1..0..1. .0..0..0..1..0..0..0
..1..1..1..0..0..1..1. .1..1..1..1..1..1..1. .0..0..0..0..0..1..0
..1..0..1..1..1..1..0. .0..1..1..1..1..1..0. .1..0..0..0..0..0..0
..1..1..1..1..1..1..1. .1..1..1..0..1..1..1. .0..0..1..0..0..0..0
..1..1..0..1..0..1..1. .0..1..1..1..1..1..0. .0..0..0..0..1..0..1
CROSSREFS
Cf. A298667.
Sequence in context: A286839 A277915 A051011 * A309628 A303716 A309629
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 24 2018
STATUS
approved