A284448 Number of n X n 0..1 arrays with the number of 1's king-move adjacent to some 0 one less than the number of 0's adjacent to some 1.

0, 0, 102, 3384, 4190874, 3177012844, 45913351929099, 746140228341333064, 140666601117969492988244

Offset

1,3

Comments

Diagonal of A284455.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
..1..1..0..0. .1..1..0..0. .0..1..0..0. .0..0..1..0. .0..0..0..0
..0..0..0..1. .1..1..1..0. .0..1..1..1. .0..1..0..0. .0..1..1..0
..1..1..0..0. .1..0..0..0. .0..0..1..0. .1..1..0..1. .1..1..0..0
..1..1..0..1. .0..1..0..1. .0..0..1..1. .1..1..0..1. .1..1..1..1

Crossrefs

Cf. A284455.

Sequence in context: A230737 A203401 A217331 * A274252 A303993 A030512

Adjacent sequences: A284445 A284446 A284447 * A284449 A284450 A284451

Keyword

nonn

Author

R. H. Hardin, Mar 27 2017

Status

approved