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A224121 Number of nX3 0..3 arrays with row sums nondecreasing and column sums unimodal 1
50, 1747, 47059, 1070499, 21632718, 400993828, 6962188526, 114852977638, 1818933416948, 27867476494858, 415428832366407, 6052984236034862, 86509041863415952, 1216196228905636823, 16857689384122403297 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A224123

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..22

EXAMPLE

Some solutions for n=3

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

..0..1..1....3..3..2....3..3..1....2..3..2....2..3..0....2..2..0....3..3..0

..3..2..3....3..3..2....2..3..2....3..3..3....2..3..3....3..1..0....2..3..2

CROSSREFS

Sequence in context: A062151 A001241 A164986 * A238283 A240191 A231696

Adjacent sequences:  A224118 A224119 A224120 * A224122 A224123 A224124

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 31 2013

STATUS

approved

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Last modified January 29 04:45 EST 2022. Contains 350672 sequences. (Running on oeis4.)