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A212932 Number of 3Xn 0..n-1 arrays with no column j greater than column j-1 in all rows 1
1, 63, 18226, 14177855, 23124921876, 68264066143602, 330676305397366860, 2450628904209116751423, 26359630332235218287361280, 394964706663355785627860751188, 7977079877065700492793254299414812 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A212930

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..16

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A289875 A062208 A132594 * A177233 A183482 A327416

Adjacent sequences:  A212929 A212930 A212931 * A212933 A212934 A212935

KEYWORD

nonn

AUTHOR

R. H. Hardin May 31 2012

STATUS

approved

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Last modified April 10 11:15 EDT 2021. Contains 342845 sequences. (Running on oeis4.)