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A204608
Number of (n+1)X(n+1) 0..1 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards
1
16, 181, 4901, 313597, 45645661, 15468240213, 11909737623605, 21224284541503781, 86355017921168786869, 809181619551978590150053, 17365790350293711986891075413, 856356938035890178758703855462533
OFFSET
1,1
COMMENTS
Diagonal of A204616
LINKS
EXAMPLE
Some solutions for n=4
..1..0..1..0..0....1..0..0..0..0....1..1..1..1..0....0..1..0..1..1
..0..0..0..0..0....1..0..1..0..1....1..1..1..1..0....1..1..0..1..1
..0..1..0..0..0....1..0..1..0..1....1..1..1..1..0....1..1..0..1..1
..0..1..0..1..0....0..0..0..0..0....0..0..0..0..0....1..1..0..1..1
..0..1..0..1..0....1..1..1..1..0....1..0..1..1..1....1..1..0..0..1
CROSSREFS
Sequence in context: A016909 A001455 A199018 * A279282 A231135 A230992
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 17 2012
STATUS
approved