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A232874 Number of (n+1)X(4+1) 0..1 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..4+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing 0
39, 311, 2715, 21639, 133532, 706994, 3457755, 16257008, 72992744, 309583532, 1229822682, 4620454491, 16559895238, 56785677343, 186875868230 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A232877

LINKS

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

EXAMPLE

Some solutions for n=5

..0..0..1..0..0....0..0..0..0..1....0..0..1..1..0....0..0..0..0..0

..0..0..0..0..1....0..0..1..1..0....1..0..1..1..0....0..1..0..0..0

..0..1..1..1..0....1..1..1..1..0....1..0..1..1..0....0..0..0..1..0

..1..1..1..0..1....0..0..1..0..1....1..0..0..0..1....1..0..1..1..0

..0..0..0..1..1....0..1..0..1..1....0..0..0..1..1....0..1..1..0..1

..0..0..0..1..1....0..0..1..1..1....0..1..1..1..1....0..0..0..1..1

CROSSREFS

Sequence in context: A327344 A190537 A187095 * A061169 A233369 A238102

Adjacent sequences:  A232871 A232872 A232873 * A232875 A232876 A232877

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 01 2013

STATUS

approved

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Last modified January 20 07:59 EST 2020. Contains 331081 sequences. (Running on oeis4.)