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A214232 Number of 0..7 colorings of an nX3 array circular in the 3 direction with new values 0..7 introduced in row major order 1
1, 18, 1067, 133265, 24424881, 5178830173, 1151035900897, 259584805701645, 58806396062245961, 13340621358732645053, 3027723874239883897377, 687250964692442612386525, 156002963224427877529575241 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A214238

LINKS

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

FORMULA

Empirical: a(n) = 343*a(n-1) -29965*a(n-2) +856493*a(n-3) -7269038*a(n-4) +11346368*a(n-5)

EXAMPLE

Some solutions for n=4

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

..1..0..3....3..2..4....1..0..3....1..2..0....1..0..3....2..0..1....3..4..0

..0..2..1....0..4..5....3..4..1....3..1..2....2..1..0....0..1..2....2..1..3

..1..0..2....6..1..7....5..1..2....2..0..1....1..0..4....1..0..3....0..2..5

CROSSREFS

Sequence in context: A095786 A214181 A275653 * A146197 A159379 A052135

Adjacent sequences:  A214229 A214230 A214231 * A214233 A214234 A214235

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 08 2012

STATUS

approved

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Last modified July 25 10:40 EDT 2017. Contains 289792 sequences.