A300366 - OEIS

A300366

Number of n X n 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 1, 0, 3, 32, 366, 12042, 729062, 70536528, 13229207915, 4795249162868

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OFFSET

1,4

COMMENTS

Diagonal of A300372.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300372.

Sequence in context: A091706 A091705 A137215 * A231591 A123336 A058479

Adjacent sequences: A300363 A300364 A300365 * A300367 A300368 A300369

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 04 2018

STATUS

approved