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A295044
Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0 or 2 1's.
0
2, 8, 72, 1569, 79855, 9388654, 2573527520, 1637027372706, 2419325802095729, 8303882960856820956, 66201888284206993138538, 1225832721132764188627254836
OFFSET
1,1
COMMENTS
Diagonal of A295051.
EXAMPLE
Some solutions for n=5
..0..0..0..1..0. .1..0..1..0..1. .0..0..1..0..0. .0..0..0..0..0
..0..0..1..0..0. .0..0..0..0..0. .1..0..0..1..0. .1..0..0..1..1
..0..0..0..0..0. .1..0..0..0..1. .0..0..0..0..0. .0..1..0..1..1
..0..1..1..0..1. .0..0..0..0..0. .1..0..0..0..1. .1..0..1..0..0
..0..1..1..0..0. .1..0..0..0..0. .0..1..0..0..0. .0..0..0..0..0
CROSSREFS
Cf. A295051.
Sequence in context: A294351 A342177 A125814 * A374872 A305000 A013002
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 13 2017
STATUS
approved