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A267971
Number of nX3 0..3 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.
2
64, 4096, 216000, 10941048, 519718464, 23689358848, 1040125019968, 44297983526887, 1837365396992000, 74486671360299008, 2959536976199968256, 115510695146966939968, 4436989542752316253696, 167999383203780355895296
OFFSET
1,1
COMMENTS
Column 3 of A267974.
FORMULA
Empirical recurrence of order 40 (see link above)
EXAMPLE
Some solutions for n=2
..0..3..2....0..1..2....2..1..3....3..2..3....3..2..1....2..3..0....3..1..3
..0..3..2....1..1..0....3..2..3....2..0..1....3..1..2....3..3..1....1..0..0
CROSSREFS
Cf. A267974.
Sequence in context: A283862 A223567 A223580 * A229102 A222934 A267994
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 23 2016
STATUS
approved