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A267930 Number of nX3 0..3 arrays with every repeated value in every row and column greater than the previous repeated value. 2
60, 3600, 178068, 8459154, 376812420, 16109362560, 663451196118, 26507885328672, 1031599522028772, 39244717326244854, 1463429227285701348, 53613261264275522982, 1933276790525967340428, 68725772580648925008792 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A267933.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 81

FORMULA

Empirical recurrence of order 81 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A267933.

Sequence in context: A223657 A264369 A053401 * A267977 A159991 A042741

Adjacent sequences:  A267927 A267928 A267929 * A267931 A267932 A267933

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 22 2016

STATUS

approved

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Last modified August 21 05:46 EDT 2019. Contains 326162 sequences. (Running on oeis4.)