A232679 Number of (n+1)X(2+1) 0..3 arrays x(i,j) with row sums sum{j*x(i,j), j=1..2+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing

562, 13266, 252071, 4171291, 60818628, 797893589, 9620349150, 107866360242, 1136104293959, 11345364093714, 108132910877094, 989116298684010

Offset

1,1

Comments

Column 2 of A232680

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A252344 A250976 A209907 * A135437 A142759 A187849

Adjacent sequences: A232676 A232677 A232678 * A232680 A232681 A232682

Keyword

nonn

Author

R. H. Hardin, Nov 27 2013

Status

approved