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A300599
Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
0
1, 3, 6, 42, 615, 16629, 1056816, 125507384, 31211394832, 15348688086725
OFFSET
1,2
COMMENTS
Diagonal of A300605.
EXAMPLE
Some solutions for n=5
..0..1..1..0..0. .0..1..1..0..0. .0..1..1..0..0. .0..0..1..0..0
..1..0..1..0..0. .1..1..0..0..0. .1..0..1..0..1. .0..1..1..0..0
..1..1..1..1..1. .1..1..0..1..1. .1..1..0..1..1. .0..0..1..1..1
..0..0..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0
..0..1..0..0..0. .1..1..0..0..0. .1..1..0..0..0. .1..1..1..0..0
CROSSREFS
Cf. A300605.
Sequence in context: A085696 A079095 A125889 * A002028 A202858 A116315
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 09 2018
STATUS
approved