A253999 Number of (7+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

3644672, 57285940, 1239374238, 22204822621, 455476058266, 10020346952054, 214599818292970, 4570180108657066, 99666970060444692, 2170596018203232720, 47121865331530404270, 1026517357233202308900, 22393446703337137863752

Offset

1,1

Comments

Row 7 of A253993

Links

R. H. Hardin, Table of n, a(n) for n = 1..32

Example

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

Crossrefs

Sequence in context: A229677 A350335 A253992 * A258909 A090074 A114686

Adjacent sequences: A253996 A253997 A253998 * A254000 A254001 A254002

Keyword

nonn

Author

R. H. Hardin, Jan 21 2015

Status

approved