A300917 - OEIS

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A300917

Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 3, 20, 593, 48588, 14914968, 13715723327, 40555879417852, 372826575580930236, 10763317686740172159278

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OFFSET

1,2

COMMENTS

Diagonal of A300923.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300923.

Sequence in context: A189603 A203228 A174972 * A089943 A108699 A162134

Adjacent sequences: A300914 A300915 A300916 * A300918 A300919 A300920

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 15 2018

STATUS

approved