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A032337 Number of identity bracelets with n labeled beads of 2 colors. 0
2, 2, 0, 0, 0, 720, 10080, 241920, 5080320, 108864000, 2474841600, 60833203200, 1569209241600, 42978897561600, 1265828788224000, 38916389191680000, 1280474741145600000, 44189183316934656000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

C. G. Bower, Transforms (2)

FORMULA

"DHJ" (bracelets, identity, labeled) transform of 2, 0, 0, 0...

n! * A032239.

CROSSREFS

Sequence in context: A285244 A263148 A230819 * A058190 A055736 A006997

Adjacent sequences:  A032334 A032335 A032336 * A032338 A032339 A032340

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 18 02:20 EST 2018. Contains 299297 sequences. (Running on oeis4.)