login
A205207
Number of (n+1)X(n+1) 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards
0
81, 3248, 357812, 155765726, 209120030041, 1034393632508251, 14824580873279399161, 797526323055787605352015, 123972751506684583828633136175, 70684339957802747710060180358201899
OFFSET
1,1
COMMENTS
Diagonal of A205215
EXAMPLE
Some solutions for n=4
..2..1..0..2..1....0..2..2..0..0....1..0..0..2..2....1..0..2..2..0
..2..0..0..2..1....2..2..2..0..0....1..0..0..2..2....0..0..1..1..0
..1..0..0..1..1....2..2..2..0..0....1..0..0..2..2....2..0..1..1..0
..0..0..0..1..2....1..1..1..0..0....1..0..0..2..2....1..0..2..2..0
..1..0..0..0..1....0..0..0..0..0....2..0..0..1..1....1..0..2..2..2
CROSSREFS
Sequence in context: A236894 A231768 A017797 * A254415 A017744 A232945
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 23 2012
STATUS
approved