A299722 - OEIS

A299722

Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

0, 4, 141, 14701, 6354153, 10997877289, 74902586591536, 2011950122182441983, 213322228614430879998326, 89271413275270487467766978900, 147444985110709910603552546954549264

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OFFSET

1,2

COMMENTS

Diagonal of A299728.

LINKS

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

EXAMPLE

Some solutions for n=5

..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0

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

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

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

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

CROSSREFS

Cf. A299728.

Sequence in context: A332114 A262653 A299061 * A210831 A247483 A293752

Adjacent sequences: A299719 A299720 A299721 * A299723 A299724 A299725

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2018

STATUS

approved