A233115 Number of (n+1)X(2+1) 0..2 arrays x(i,j) with row sums sum{x(i,j), j=1..2+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing

112, 1182, 11741, 110078, 980034, 8365600, 69167118, 557105428, 4392700238, 34045606996, 260119493281, 1963609837865, 14674717360823, 108734253071678, 799781540072261, 5845908050962049, 42499114563946926, 307511237752310135

Offset

1,1

Comments

Column 2 of A233117

Links

Table of n, a(n) for n=1..18.

Example

Some solutions for n=4
..1..2..0....0..1..0....1..2..0....0..0..0....1..2..0....0..0..1....0..1..0
..2..0..2....1..0..1....0..1..2....0..0..2....0..2..1....1..1..0....1..1..0
..1..1..2....0..0..2....2..1..0....0..1..2....0..1..2....2..1..0....1..1..0
..0..2..2....2..1..1....1..1..1....1..2..2....1..2..1....0..1..2....0..1..2
..1..2..2....1..2..2....0..1..2....2..2..2....2..0..2....0..1..2....2..1..2

Crossrefs

Sequence in context: A234673 A232785 A232850 * A188152 A353782 A367363

Adjacent sequences: A233112 A233113 A233114 * A233116 A233117 A233118

Keyword

nonn

Author

R. H. Hardin, Dec 04 2013

Status

approved