A282878 Number of n X n 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element.

0, 2, 74, 3762, 480995, 128768496, 79687436788, 115172557654616, 393143666098549156, 3196549492640753656296, 62216948503916625663186184

Offset

1,2

Comments

Diagonal of A282885.

Links

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

Example

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

Crossrefs

Cf. A282885.

Sequence in context: A295172 A351589 A322281 * A062552 A116172 A358383

Adjacent sequences: A282875 A282876 A282877 * A282879 A282880 A282881

Keyword

nonn

Author

R. H. Hardin, Feb 24 2017

Status

approved