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A229591 Number of defective 3-colorings of a 6Xn 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order 1
0, 5632, 119232, 2440692, 47091780, 890824020, 16551428868, 303527605644, 5505540489756, 98960332779288, 1765177724896272, 31280718324457188, 551219288985891468, 9666198588289311180, 168785901193243289256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 6 of A229586

LINKS

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

FORMULA

Empirical: a(n) = 60*a(n-1) -1466*a(n-2) +19056*a(n-3) -143515*a(n-4) +608478*a(n-5) -957350*a(n-6) -3924114*a(n-7) +27201539*a(n-8) -68079378*a(n-9) +46537423*a(n-10) +212613240*a(n-11) -785654632*a(n-12) +1389943104*a(n-13) -1544105168*a(n-14) +1125401088*a(n-15) -524553472*a(n-16) +142135296*a(n-17) -17040384*a(n-18) for n>26

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

CROSSREFS

Sequence in context: A031573 A031753 A045128 * A161193 A022010 A201252

Adjacent sequences:  A229588 A229589 A229590 * A229592 A229593 A229594

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 26 2013

STATUS

approved

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Last modified February 28 11:05 EST 2020. Contains 332323 sequences. (Running on oeis4.)