A233376 Number of (2+1)X(n+1) 0..2 arrays x(i,j) with row sums sum{x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..2+1} nondecreasing.

117, 1046, 7595, 46935, 254725, 1242042, 5538026, 22884715, 88577443, 323908967, 1126962281, 3752622108, 12018652575, 37179997956, 111500267903, 325181295220, 924812060067, 2571036007642, 7001871008078, 18714994291394, 49177003589853

Offset

1,1

Comments

Row 2 of A233374.

Links

R. H. Hardin, Table of n, a(n) for n = 1..67

Example

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

Crossrefs

Sequence in context: A273125 A327599 A326064 * A233051 A278774 A219990

Adjacent sequences: A233373 A233374 A233375 * A233377 A233378 A233379

Keyword

nonn

Author

R. H. Hardin, Dec 08 2013

Status

approved