A233304 Number of (4+1) X (n+1) 0..1 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..4+1} nondecreasing.

64, 502, 3556, 21957, 122022, 616439, 2871477, 12451710, 50714574, 195371008, 716295219, 2512238327, 8466906587, 27527291020, 86628418167, 264674530948, 787179022872, 2284373978387, 6482027000245, 18018759544172, 49152990387893

Offset

1,1

Comments

Row 4 of A233301.

Links

R. H. Hardin, Table of n, a(n) for n = 1..25

Example

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

Crossrefs

Cf. A233301.

Sequence in context: A187518 A221070 A297844 * A016803 A066430 A115740

Adjacent sequences: A233301 A233302 A233303 * A233305 A233306 A233307

Keyword

nonn

Author

R. H. Hardin, Dec 07 2013

Status

approved