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A250450
Number of (n+1)X(4+1) 0..2 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction
1
4535, 141857, 3865967, 104578590, 2750712613, 71984404630, 1868402502223, 48446319776685, 1253388924506698, 32426207385598948, 838397988936401847, 21678843535834780799, 560468876574353975606, 14490586947154204948722
OFFSET
1,1
COMMENTS
Column 4 of A250454
FORMULA
Empirical recurrence of order 50 (see link above)
EXAMPLE
Some solutions for n=2
..0..1..0..0..2....0..0..0..0..0....0..1..0..0..1....0..1..0..0..0
..0..0..0..1..2....0..0..2..1..2....0..0..1..0..1....0..0..1..0..0
..1..0..2..1..1....0..0..1..1..2....0..0..0..2..2....0..0..0..0..2
CROSSREFS
Sequence in context: A104845 A235852 A138731 * A339795 A337314 A234171
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 23 2014
STATUS
approved