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A232873 Number of (n+1)X(3+1) 0..1 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..3+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing 1
25, 130, 650, 2715, 8988, 26553, 74515, 202293, 523052, 1268666, 2897425, 6311293, 13270455, 26979740, 53109749, 101190045, 187316955, 338279583, 597743822, 1035188036, 1758172498, 2931994598, 4807675414, 7759356347, 12338518046 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A232877

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..29

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A042216 A042218 A045166 * A232856 A232792 A305956

Adjacent sequences:  A232870 A232871 A232872 * A232874 A232875 A232876

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 01 2013

STATUS

approved

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Last modified October 4 08:15 EDT 2022. Contains 357238 sequences. (Running on oeis4.)