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A299452
Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
1, 5, 7, 48, 1015, 19041, 750083, 67847199, 10455199270, 2719125337850
OFFSET
1,2
COMMENTS
Diagonal of A299458.
EXAMPLE
Some solutions for n=5
..0..0..1..1..1. .0..0..1..1..0. .0..1..1..0..0. .0..0..0..0..0
..1..0..1..1..1. .1..0..0..1..1. .0..0..1..0..1. .0..0..0..0..0
..0..0..0..0..0. .0..0..0..0..0. .1..1..1..1..1. .0..0..0..0..0
..0..1..0..0..0. .1..1..0..0..0. .1..1..1..0..0. .1..1..0..1..1
..1..1..0..0..0. .1..1..0..0..0. .1..1..1..0..1. .0..1..0..0..1
CROSSREFS
Cf. A299458.
Sequence in context: A025530 A106114 A217039 * A110420 A210244 A123789
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 10 2018
STATUS
approved