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

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