A032337 Number of identity bracelets with n labeled beads of 2 colors.

2, 2, 0, 0, 0, 720, 10080, 241920, 5080320, 108864000, 2474841600, 60833203200, 1569209241600, 42978897561600, 1265828788224000, 38916389191680000, 1280474741145600000, 44189183316934656000

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: A263148 A230819 A317573 * A058190 A055736 A006997

Adjacent sequences: A032334 A032335 A032336 * A032338 A032339 A032340

Keyword

nonn

Author

Christian G. Bower

Status

approved