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A299054
Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
0
1, 5, 38, 2096, 295407, 199153610, 491688804213, 4462148033879670, 148475436881582614613
OFFSET
1,2
COMMENTS
Diagonal of A299060.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..1..0. .0..0..0..1..1. .0..0..0..1..1
..1..0..1..1..0. .0..0..0..1..1. .0..1..1..0..1. .0..1..1..0..1
..0..0..1..0..0. .1..0..1..1..0. .1..1..0..0..0. .1..0..0..0..1
..0..0..0..1..1. .0..0..0..1..1. .1..1..1..1..1. .1..0..1..1..1
..0..0..1..1..0. .0..0..0..1..0. .0..1..1..0..1. .1..1..1..1..1
CROSSREFS
Cf. A299060.
Sequence in context: A338867 A110467 A221845 * A095230 A247708 A171555
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 01 2018
STATUS
approved