A254012 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally

512, 7212, 89310, 1016249, 3486340, 12820652, 45398628, 102538840, 261881432, 773696684, 1940850378, 4904675739, 13916479182, 35276177013

Offset

1,1

Comments

Diagonal of A254020

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Sequence in context: A253833 A017487 A263034 * A258518 A222775 A257419

Adjacent sequences: A254009 A254010 A254011 * A254013 A254014 A254015

Keyword

nonn

Author

R. H. Hardin, Jan 22 2015

Status

approved