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A278725 Number of nX6 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order. 1
84, 10401, 2487889, 815294800, 279368748599, 90462380211862, 26947618206791521, 7361981179311574929, 1850980180963910285369, 430395479744245915185211, 93005966539515246802755901 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A278727.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Cf. A278727.

Sequence in context: A224022 A283947 A265586 * A186245 A224429 A289325

Adjacent sequences:  A278722 A278723 A278724 * A278726 A278727 A278728

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 27 2016

STATUS

approved

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Last modified December 12 12:30 EST 2019. Contains 329958 sequences. (Running on oeis4.)