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A201388 Number of nX3 0..3 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other 1
4, 137, 1606, 5897, 236224, 3364770, 19735330, 40088345, 1066040173, 10207216063, 41478543314, 60255150730, 1228071405908, 9109985067401, 29080781926297, 33671540790223, 567086887068128, 3500195283945353, 9371250160350500 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A201393

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A001374 A229416 A155207 * A089666 A029850 A221675

Adjacent sequences:  A201385 A201386 A201387 * A201389 A201390 A201391

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 30 2011

STATUS

approved

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Last modified December 8 00:04 EST 2021. Contains 349590 sequences. (Running on oeis4.)