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A295545 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 3 or 4 1's. 0
1, 5, 34, 598, 23315, 2094347, 434357928, 207301696580, 228110991493680, 578288109272844847, 3378456566297565709729 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A295551.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A295551.

Sequence in context: A130607 A211042 A086345 * A309534 A194687 A208098

Adjacent sequences:  A295542 A295543 A295544 * A295546 A295547 A295548

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 23 2017

STATUS

approved

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Last modified October 23 00:24 EDT 2020. Contains 337962 sequences. (Running on oeis4.)