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A302454
Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
0
1, 2, 18, 10, 924, 5266, 404761, 26036557, 4110999261, 1386699669527
OFFSET
1,2
COMMENTS
Diagonal of A302460.
EXAMPLE
Some solutions for n=5
..0..1..0..0..1. .0..1..0..1..1. .0..1..1..0..1. .0..1..1..0..1
..1..1..1..0..0. .1..1..1..1..1. .0..1..1..0..1. .0..1..1..0..1
..0..1..1..0..0. .0..1..0..0..0. .0..1..0..0..0. .0..1..0..0..0
..1..1..1..0..0. .0..1..1..0..1. .1..1..1..0..0. .0..1..1..0..1
..0..1..0..0..1. .1..1..1..0..1. .1..1..0..0..0. .1..1..1..0..1
CROSSREFS
Cf. A302460.
Sequence in context: A093481 A132629 A288161 * A303236 A174708 A328648
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 08 2018
STATUS
approved