A250542 Number of (n+1)X(6+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction

905440, 13657024, 117777788, 752602024, 4013192386, 19031828420, 83356429646, 345394150196, 1375930596944, 5328628464360, 20220736129384, 75618410690640, 279874213617366, 1028575074942300, 3763545764867642, 13740591719926652

Offset

1,1

Comments

Column 6 of A250544

Links

R. H. Hardin, Table of n, a(n) for n = 1..87

Formula

Empirical: a(n) = 30*a(n-1) -415*a(n-2) +3514*a(n-3) -20386*a(n-4) +85924*a(n-5) -272198*a(n-6) +661180*a(n-7) -1244717*a(n-8) +1822478*a(n-9) -2068955*a(n-10) +1802474*a(n-11) -1181760*a(n-12) +563888*a(n-13) -184752*a(n-14) +37152*a(n-15) -3456*a(n-16)

Example

Some solutions for n=1
..2..0..2..1..2..0..2....2..2..2..3..0..0..1....2..0..3..0..0..1..2
..2..1..3..2..3..1..3....1..1..1..2..0..1..3....2..0..3..0..0..1..3

Crossrefs

Sequence in context: A209209 A104847 A251520 * A251799 A348078 A348101

Adjacent sequences: A250539 A250540 A250541 * A250543 A250544 A250545

Keyword

nonn

Author

R. H. Hardin, Nov 24 2014

Status

approved