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A233119 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*x(i,j), i=1..2+1} nondecreasing 1
123, 1182, 9514, 67130, 427059, 2495541, 13620058, 70213894, 344898281, 1625999707, 7398978182, 32644783397, 140193521403, 587883227613, 2413542952866, 9723315619156, 38513619901599, 150236979229584 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A233117

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..62

EXAMPLE

Some solutions for n=4

..0..1..1..0..1....0..0..0..2..2....0..1..1..1..2....0..0..1..2..1

..2..0..0..2..0....0..2..2..1..1....1..2..2..1..2....2..2..0..0..2

..0..1..1..0..2....2..1..1..1..2....2..1..1..2..2....0..1..2..2..2

CROSSREFS

Sequence in context: A074303 A077379 A135475 * A174173 A116935 A265983

Adjacent sequences:  A233116 A233117 A233118 * A233120 A233121 A233122

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 04 2013

STATUS

approved

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Last modified September 20 23:04 EDT 2021. Contains 347596 sequences. (Running on oeis4.)