A251186 Number of (n+2)X(n+2) 0..1 arrays with nondecreasing sum of every three consecutive values in every row and column

512, 7776, 209952, 10077696, 259200000, 9600000000, 512000000000, 16807000000000, 720600125000000, 40353607000000000, 1525017689435520000, 71151225318303621120, 4098310578334288576512, 169762607240564688666624

Offset

1,1

Comments

Diagonal of A251192

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

Some solutions for n=2
..0..0..1..1....0..1..0..0....0..0..0..0....0..1..1..1....0..0..0..0
..1..0..1..1....1..1..1..1....0..1..1..1....1..0..0..1....0..1..0..0
..0..0..0..0....0..0..1..0....0..0..0..0....0..1..1..1....0..0..0..1
..0..1..1..1....1..1..0..1....0..1..0..1....1..1..1..1....0..0..0..1

Crossrefs

Sequence in context: A222775 A257419 A255749 * A257202 A070057 A017619

Adjacent sequences: A251183 A251184 A251185 * A251187 A251188 A251189

Keyword

nonn

Author

R. H. Hardin, Nov 30 2014

Status

approved