A233369 Number of (4+1)X(n+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..4+1} nondecreasing

39, 364, 2639, 16113, 91448, 494606, 2508451, 11763318, 51347073, 210818945, 820547818, 3039632158, 10755842167, 36538214364, 119695037477

Offset

1,1

Comments

Row 4 of A233366

Links

Table of n, a(n) for n=1..15.

Example

Some solutions for n=5
..0..0..1..1..0..0....1..0..1..1..0..0....0..0..1..0..0..0....0..0..0..0..0..0
..0..0..1..0..1..1....1..1..0..0..1..0....0..0..0..1..0..0....0..0..0..1..0..0
..1..0..0..1..1..1....0..1..0..0..0..1....0..0..0..0..1..0....0..1..0..0..1..1
..0..1..0..1..1..1....1..0..1..1..1..1....0..1..0..0..0..1....1..1..0..1..1..1
..0..0..1..1..1..1....0..1..1..1..1..1....0..0..1..1..1..1....0..0..1..1..1..1

Crossrefs

Sequence in context: A187095 A232874 A061169 * A238102 A266172 A229601

Adjacent sequences: A233366 A233367 A233368 * A233370 A233371 A233372

Keyword

nonn

Author

R. H. Hardin, Dec 08 2013

Status

approved