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A299315
Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
0
1, 1, 15, 12, 1306, 44381, 7885194, 3745566028, 4909629881306
OFFSET
1,3
COMMENTS
Diagonal of A299321.
EXAMPLE
Some solutions for n=5
..0..0..0..0..1. .0..0..0..1..1. .0..1..1..1..1. .0..0..1..1..1
..0..0..0..0..0. .0..0..0..1..1. .1..1..1..1..1. .0..0..1..1..1
..1..0..1..0..0. .0..0..1..1..0. .0..1..0..1..0. .0..0..0..1..1
..0..0..0..0..0. .0..0..0..1..1. .1..1..1..1..1. .0..0..0..0..0
..0..0..0..0..1. .1..0..0..1..1. .1..1..1..1..1. .1..0..1..0..0
CROSSREFS
Cf. A299321.
Sequence in context: A273445 A338069 A195533 * A072348 A317422 A129786
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 06 2018
STATUS
approved