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A318422
Number of nX7 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
1, 23, 9, 225, 839, 2489, 11802, 45560, 190929, 738777, 2951001, 11787988, 47807984, 192301338, 774415325, 3108883286, 12511830132, 50334154452, 202614148901, 815213327373, 3280146476950, 13197123253932, 53103818253054
OFFSET
1,2
COMMENTS
Column 7 of A318423.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..0..1..1. .0..1..1..1..0..0..1. .0..1..1..1..0..1..0
..0..0..1..1..0..0..0. .1..0..0..0..1..0..0. .1..0..0..0..1..1..0
..0..1..0..1..0..0..1. .0..0..0..0..0..1..0. .0..0..0..1..1..1..0
..1..1..1..1..1..1..0. .1..1..1..1..0..0..1. .1..1..1..0..0..1..1
..0..0..0..0..1..0..1. .1..1..1..1..0..1..0. .0..1..0..0..0..1..0
CROSSREFS
Cf. A318423.
Sequence in context: A134910 A278339 A317814 * A013360 A013491 A040509
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 26 2018
STATUS
approved