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A300805
Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
0
1, 8, 170, 9504, 1415898, 559634028, 585611214958, 1623186113355468, 11918444465082418938, 231853794250990035322072
OFFSET
1,2
COMMENTS
Diagonal of A300811.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..1..1..1..0..1. .0..1..1..0..1. .1..0..1..1..0. .0..1..1..1..0
..1..0..1..0..1. .0..0..1..0..0. .0..1..0..1..1. .1..0..0..0..1
..0..0..0..1..0. .1..0..1..1..1. .0..0..0..1..0. .0..1..0..1..0
..1..1..1..1..0. .0..0..1..0..0. .0..0..1..0..1. .1..1..0..0..1
CROSSREFS
Cf. A300811.
Sequence in context: A001534 A096486 A303463 * A317566 A301444 A333036
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 13 2018
STATUS
approved