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A299522
Number of n X n 0..1 arrays with every element equal to 1, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
0, 4, 1, 166, 7116, 278292, 135080376, 167282094170, 363524287053851
OFFSET
1,2
COMMENTS
Diagonal of A299528.
EXAMPLE
Some solutions for n=5
..0..0..0..1..1. .0..0..0..1..0. .0..1..1..0..1. .0..0..1..1..0
..0..0..0..0..0. .0..0..0..1..0. .1..0..1..1..0. .1..1..1..0..1
..1..1..0..1..1. .0..0..0..1..1. .0..0..0..0..0. .1..1..1..0..0
..0..0..0..0..0. .1..0..1..1..0. .1..0..1..0..0. .0..1..0..0..1
..1..1..0..0..0. .0..1..1..1..0. .0..1..1..1..1. .1..0..0..0..1
CROSSREFS
Cf. A299528.
Sequence in context: A125083 A094423 A262404 * A300140 A347554 A298939
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 11 2018
STATUS
approved