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A300373 Number of nXn 0..1 arrays with every element equal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 3, 4, 26, 389, 8839, 481311, 47968011, 9905247305, 3987964431282, 3056200820361709 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300380.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300380.

Sequence in context: A302397 A151372 A258103 * A222112 A032832 A041021

Adjacent sequences:  A300370 A300371 A300372 * A300374 A300375 A300376

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 04 2018

STATUS

approved

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Last modified February 19 19:30 EST 2020. Contains 332047 sequences. (Running on oeis4.)