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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A295051.

LINKS

Table of n, a(n) for n=1..12.

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: A107270 A294351 A125814 * A305000 A013002 A012998

Adjacent sequences:  A295041 A295042 A295043 * A295045 A295046 A295047

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 13 2017

STATUS

approved

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Last modified October 1 17:45 EDT 2020. Contains 337444 sequences. (Running on oeis4.)