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A032261 Number of bracelets with n labeled beads of 3 colors. 0
3, 9, 27, 243, 2916, 43740, 787320, 16533720, 396809280, 10713850560, 321415516800, 10606712054400, 381841633958400, 14891823724377600, 625456596423859200, 28145546839073664000, 1350986248275535872000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..17.

C. G. Bower, Transforms (2)

FORMULA

"DIJ" (bracelet, indistinct, labeled) transform of 3, 0, 0, 0...

3^n*(3n-3)!/2 (n >= 3).

CROSSREFS

Sequence in context: A299597 A143014 A202907 * A018924 A061582 A175129

Adjacent sequences:  A032258 A032259 A032260 * A032262 A032263 A032264

KEYWORD

nonn,easy

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 22 18:00 EST 2018. Contains 299469 sequences. (Running on oeis4.)