A300764 - OEIS

A300764

Number of n X n 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, 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: A337169 A367785 A199489 * A381147 A209470 A140636

Adjacent sequences: A300761 A300762 A300763 * A300765 A300766 A300767

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 12 2018

STATUS

approved