A285023 Number of n X n 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.

0, 2, 97, 6460, 3708321, 5075612300, 40651048407879, 1063834786036208904, 129443742138071637706453

Offset

1,2

Comments

Diagonal of A285030.

Links

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

Example

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

Crossrefs

Cf. A285030.

Sequence in context: A233767 A223936 A224083 * A232865 A173837 A351447

Adjacent sequences: A285020 A285021 A285022 * A285024 A285025 A285026

Keyword

nonn

Author

R. H. Hardin, Apr 08 2017

Status

approved