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A299360
Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.
0
1, 5, 23, 1157, 107653, 45416563, 67756659422, 330429744419500, 5443538715354004433
OFFSET
1,2
COMMENTS
Diagonal of A299366.
EXAMPLE
Some solutions for n=5
..0..1..1..1..1. .0..1..1..1..1. .0..0..1..1..1. .0..1..1..1..1
..1..1..0..0..1. .1..1..0..0..1. .1..0..1..1..1. .1..1..0..0..1
..1..0..0..1..0. .0..1..0..1..0. .0..0..1..1..1. .0..1..0..1..1
..1..1..0..0..1. .1..1..1..0..0. .0..1..0..0..0. .1..1..1..1..0
..1..0..0..1..1. .1..1..0..0..1. .1..1..0..1..0. .1..0..1..0..0
CROSSREFS
Cf. A299366.
Sequence in context: A361402 A055490 A261935 * A002811 A177134 A199361
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 08 2018
STATUS
approved