A251002 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than the absolute difference of its antidiagonal elements

69, 10743, 11671623, 87861924805, 4588026318857390, 1661795248800209092018, 4174999762523849415510268532, 72754439546501362273096881625623943, 8794003889120582191141511584460660923446950

Offset

1,1

Comments

Diagonal of A251010

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A234824 A232719 A297807 * A194612 A297768 A268847

Adjacent sequences: A250999 A251000 A251001 * A251003 A251004 A251005

Keyword

nonn

Author

R. H. Hardin, Nov 29 2014

Status

approved