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A302883
Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
0
1, 2, 37, 238, 20937, 3452246, 2899297652, 7977498513759, 75895729469717417
OFFSET
1,2
COMMENTS
Diagonal of A302889.
EXAMPLE
Some solutions for n=5
..0..1..1..0..1. .0..0..0..0..0. .0..0..1..1..1. .0..0..0..1..1
..1..1..0..0..0. .0..0..0..0..0. .1..0..0..1..1. .1..0..0..1..1
..0..0..1..0..0. .0..0..1..1..0. .1..0..0..0..0. .1..0..1..0..1
..0..0..0..1..1. .1..1..1..0..0. .1..0..1..0..0. .0..0..0..1..1
..1..0..0..1..1. .0..1..1..0..0. .0..0..0..0..0. .0..0..0..1..1
CROSSREFS
Cf. A302889.
Sequence in context: A139119 A244757 A298476 * A053788 A078976 A200911
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 15 2018
STATUS
approved