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A300132
Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 1, 16, 27, 2156, 98708, 20405641, 11565870189, 18502726008627, 89752056907627200
OFFSET
1,3
COMMENTS
Diagonal of A300138.
EXAMPLE
Some solutions for n=5
..0..0..1..0..1. .0..1..1..0..0. .0..0..0..0..0. .0..0..0..0..1
..0..0..0..0..0. .1..1..1..0..0. .0..0..1..0..0. .0..0..0..0..0
..0..0..1..0..1. .0..1..1..1..1. .1..1..1..1..0. .0..0..1..0..1
..0..0..0..0..0. .1..1..1..1..1. .1..1..1..0..0. .0..0..0..0..0
..1..0..1..0..1. .0..1..0..1..0. .0..1..1..0..0. .1..0..0..0..1
CROSSREFS
Cf. A300138.
Sequence in context: A073396 A338093 A302553 * A101857 A350302 A184039
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 26 2018
STATUS
approved