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A303463
Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
0
1, 8, 170, 9110, 1243692, 427097893, 373571747330, 831176090437185, 4696687907289825363
OFFSET
1,2
COMMENTS
Diagonal of A303469.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..0
..1..1..0..1..1. .0..1..1..0..1. .0..0..1..1..1. .1..0..1..1..0
..0..1..0..1..1. .0..1..0..0..1. .1..0..1..1..1. .0..0..1..1..0
..1..1..0..1..1. .0..0..0..1..1. .1..0..0..0..1. .1..0..0..1..0
..0..1..0..1..0. .0..1..0..0..0. .0..0..1..0..0. .1..0..1..1..1
CROSSREFS
Cf. A303469.
Sequence in context: A316816 A001534 A096486 * A300805 A317566 A301444
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 24 2018
STATUS
approved