A253343 Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally

16, 173, 4800, 305872, 44555528, 15101198444, 11626813328444, 20721971614675948, 84309722535540935020, 790037357585204417117612, 16954849455945229046581221580, 836098119050722296202025294716588

Offset

1,1

Comments

Diagonal of A253350

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

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

Crossrefs

Sequence in context: A018209 A021174 A021374 * A215687 A187720 A017931

Adjacent sequences: A253340 A253341 A253342 * A253344 A253345 A253346

Keyword

nonn

Author

R. H. Hardin, Dec 30 2014

Status

approved