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A300764 Number of nXn 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
0, 2, 13, 91, 783, 8090, 112573, 2075151, 50274484, 1559878234, 63280942949 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300769.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300769.

Sequence in context: A126035 A074617 A199489 * A209470 A140636 A282724

Adjacent sequences:  A300761 A300762 A300763 * A300765 A300766 A300767

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 12 2018

STATUS

approved

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Last modified August 5 21:18 EDT 2020. Contains 336213 sequences. (Running on oeis4.)