A253977 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum plus antidiagonal maximum nondecreasing horizontally and vertically

512, 36434, 8727838, 6386040127, 14408056664402, 102388257971324416, 2226119429950951897595, 151063750081520227274811711, 31807128404517752548656750421959, 20709613032568160385951820991247134611

Offset

1,1

Comments

Diagonal of A253985

Links

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

Example

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

Crossrefs

Sequence in context: A308815 A253536 A254383 * A254084 A284033 A240933

Adjacent sequences: A253974 A253975 A253976 * A253978 A253979 A253980

Keyword

nonn

Author

R. H. Hardin, Jan 21 2015

Status

approved