A254720 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and the central column and the two medians of the diagonal and antidiagonal nondecreasing horizontally and vertically.

512, 14226, 520824, 32264339, 2863637632, 506044306865, 162482923579610, 90639442390243324, 95773607175290394948, 184158178916886032646658

Offset

1,1

Comments

Diagonal of A254728

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A254504 A253812 A256947 * A254252 A200791 A254812

Adjacent sequences: A254717 A254718 A254719 * A254721 A254722 A254723

Keyword

nonn

Author

R. H. Hardin, Feb 06 2015

Status

approved