A284192 Number of n X n 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

1, 4, 43, 5268, 1488503, 3083244672, 18564422929880, 573011303756296687, 62959447148443427630088

Offset

1,2

Comments

Diagonal of A284199.

Links

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

Example

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

Crossrefs

Cf. A284199.

Sequence in context: A176827 A220675 A222979 * A278798 A102388 A364680

Adjacent sequences: A284189 A284190 A284191 * A284193 A284194 A284195

Keyword

nonn

Author

R. H. Hardin, Mar 22 2017

Status

approved