A254383 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum plus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally

512, 35529, 8533796, 6208345944, 14008701570284, 99661265319327258, 2165666188993340904078, 146977323440908911644985083, 30949376415040215031162843169020, 20149875590838758609564635874891385665

Offset

1,1

Comments

Diagonal of A254390

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

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

Crossrefs

Sequence in context: A253864 A308815 A253536 * A253977 A254084 A284033

Adjacent sequences: A254380 A254381 A254382 * A254384 A254385 A254386

Keyword

nonn

Author

R. H. Hardin, Jan 29 2015

Status

approved