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A300633 Number of nXn 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
0, 2, 13, 97, 1130, 23097, 865205, 57365508, 7042663221, 1472367608349 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300639.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300639.

Sequence in context: A320360 A074614 A184019 * A064325 A123619 A187746

Adjacent sequences:  A300630 A300631 A300632 * A300634 A300635 A300636

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 10 2018

STATUS

approved

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Last modified February 22 16:40 EST 2019. Contains 320399 sequences. (Running on oeis4.)