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A316117 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 0
1, 4, 13, 56, 1109, 43480, 2525039, 351431316, 112149224917, 58115173076989 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A316123.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..1..0. .0..1..1..0..1. .0..1..0..1..0. .0..1..1..1..0
..1..0..1..0..1. .0..1..0..0..0. .0..1..1..1..0. .1..0..0..0..1
..1..0..1..0..1. .0..0..1..1..1. .0..1..0..0..1. .0..1..1..0..1
..1..0..1..0..1. .0..1..0..0..1. .0..0..1..1..0. .0..0..1..0..1
..1..0..0..1..0. .1..0..1..1..0. .1..0..0..0..1. .1..1..1..1..0
CROSSREFS
Cf. A316123.
Sequence in context: A009300 A192372 A304670 * A149477 A149478 A149479
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 24 2018
STATUS
approved

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Last modified May 18 09:54 EDT 2024. Contains 372620 sequences. (Running on oeis4.)