A282968 Number of nX7 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements.

13, 1062, 70722, 3128641, 124683166, 4646063540, 163712015523, 5565122952951, 183787303136570, 5933174659006889, 188046122434187598, 5869444194877190997, 180856319148205715506, 5511700995496951358631, 166379407700820906229446

Offset

1,1

Comments

Column 7 of A282969.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=3
..0..0..1..1..0..0..0. .0..1..0..0..1..1..0. .1..0..1..0..0..0..0
..0..0..0..1..0..0..0. .1..0..0..1..0..0..0. .1..0..1..1..0..0..0
..1..0..0..1..0..1..0. .1..0..0..0..0..0..1. .0..0..0..1..0..1..1

Crossrefs

Cf. A282969.

Sequence in context: A128685 A292337 A201118 * A262632 A076481 A185834

Adjacent sequences: A282965 A282966 A282967 * A282969 A282970 A282971

Keyword

nonn

Author

R. H. Hardin, Feb 25 2017

Status

approved