A253758 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal median minus antidiagonal median nondecreasing horizontally and vertically.

2992, 23096, 164120, 1135439, 8385264, 60838168, 447022128, 3260897684, 23933092377, 175157529922, 1285172525906, 9417586233972, 69080720488227, 506445689265095, 3714389996410083, 27235730764751289, 199739317597923299

Offset

1,1

Comments

Column 2 of A253764

Links

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

Example

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

Crossrefs

Sequence in context: A346221 A253962 A253955 * A230013 A158963 A178326

Adjacent sequences: A253755 A253756 A253757 * A253759 A253760 A253761

Keyword

nonn

Author

R. H. Hardin, Jan 11 2015

Status

approved