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A295410 Number of nXn 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 3 1s. 1
1, 10, 234, 19026, 5741797, 6093564449, 23025368248778, 309978055996363953, 14848281990251202621848, 2531566579339095935434773023, 1536279445900820560553369496441851 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A295416.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A295416.

Sequence in context: A087434 A297648 A012240 * A188679 A167867 A268080

Adjacent sequences:  A295407 A295408 A295409 * A295411 A295412 A295413

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 22 2017

STATUS

approved

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Last modified October 20 12:47 EDT 2019. Contains 328257 sequences. (Running on oeis4.)