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A214108
Number of 0..3 colorings on an nX5 array circular in the 5 direction with new values 0..3 introduced in row major order
1
10, 670, 44900, 3008980, 201647240, 13513419640, 905603817680, 60689173906000, 4067093973641120, 272556904729800160, 18265441319366096960, 1224061254004727782720, 82030646145243326825600
OFFSET
1,1
COMMENTS
Column 4 of A214112
LINKS
FORMULA
Empirical: a(n) = 68*a(n-1) -66*a(n-2).
Empirical: G.f. -10*x*(-1+x) / ( 1-68*x+66*x^2 ). - R. J. Mathar, Jul 04 2012
EXAMPLE
Some solutions for n=4
..0..1..2..3..1....0..1..0..1..2....0..1..0..1..2....0..1..0..2..3
..3..2..0..1..2....1..0..1..0..3....2..3..1..2..0....1..2..1..3..0
..1..3..1..2..0....2..1..3..2..1....1..0..2..0..2....3..1..3..1..2
..0..1..0..3..1....3..0..1..0..2....2..1..3..1..0....0..3..1..2..1
CROSSREFS
Sequence in context: A099024 A126680 A249848 * A174061 A058174 A006435
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 04 2012
STATUS
approved