A254798 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally

2700, 10484, 46026, 132639, 479464, 1478353, 5237645, 17246499, 60236570, 204026967, 706743239, 2418324163, 8340069598, 28629854395, 98536216359, 338578011548, 1164370558418, 4002071155295, 13759672499086, 47299540944711

Offset

1,1

Comments

Column 2 of A254804

Links

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

Example

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

Crossrefs

Sequence in context: A109994 A322525 A254805 * A253814 A054561 A230752

Adjacent sequences: A254795 A254796 A254797 * A254799 A254800 A254801

Keyword

nonn

Author

R. H. Hardin, Feb 08 2015

Status

approved