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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
1
16, 173, 4800, 305872, 44555528, 15101198444, 11626813328444, 20721971614675948, 84309722535540935020, 790037357585204417117612, 16954849455945229046581221580, 836098119050722296202025294716588
OFFSET
1,1
COMMENTS
Diagonal of A253350
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 30 2014
STATUS
approved