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A303236
Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
0
1, 2, 18, 10, 1106, 7823, 686376, 48315454, 9508520220, 3548066642083
OFFSET
1,2
COMMENTS
Diagonal of A303242.
EXAMPLE
Some solutions for n=5
..0..0..1..1..1. .0..1..1..0..0. .0..1..1..0..1. .0..1..0..1..1
..1..0..0..1..1. .1..1..0..0..1. .0..1..1..0..1. .1..1..1..1..1
..1..0..1..1..1. .0..1..1..0..1. .1..1..0..0..0. .0..1..0..1..0
..0..0..0..0..0. .0..1..1..0..0. .0..1..1..0..0. .1..1..0..1..0
..1..0..1..0..1. .1..1..0..0..1. .1..1..0..0..0. .1..1..0..1..0
CROSSREFS
Cf. A303242.
Sequence in context: A132629 A288161 A302454 * A174708 A328648 A359197
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 20 2018
STATUS
approved