A295373 - OEIS

A295373

Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2 or 4 1's.

2, 8, 74, 1634, 85310, 10437240, 2995361770, 2013609204094, 3172028798241544, 11706071393300493820, 101212810609370065235246, 2050164710762566420019514822

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OFFSET

1,1

COMMENTS

Diagonal of A295379.

LINKS

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

EXAMPLE

Some solutions for n=5

..0..1..0..0..0. .0..0..0..1..0. .0..0..0..0..0. .0..0..1..1..0

..0..0..0..1..0. .1..0..0..0..0. .0..0..1..0..1. .1..0..1..1..1

..0..0..1..0..0. .0..1..0..1..0. .0..1..0..1..0. .0..0..0..1..1

..0..0..0..0..0. .1..0..1..0..0. .0..0..0..0..0. .0..0..0..0..0

..0..0..1..0..1. .0..0..0..1..0. .0..1..0..1..0. .0..0..1..0..0

CROSSREFS

Cf. A295379.

Sequence in context: A143760 A064605 A356108 * A356746 A132039 A204552

Adjacent sequences: A295370 A295371 A295372 * A295374 A295375 A295376

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 21 2017

STATUS

approved