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A032221 Number of ways to partition n labeled elements into pie slices of different sizes of at least 2, allowing the pie to be turned over. 0
0, 1, 1, 1, 11, 16, 57, 85, 1507, 2896, 12563, 51074, 138789, 7999447, 20571904, 108097917, 509724227, 3208109968, 10079065623, 1222567789870, 3713826929467, 23585723568309, 124658237924300 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..23.

C. G. Bower, Transforms (2)

FORMULA

"DGJ" (bracelet, element, labeled) transform of 0, 1, 1, 1...

CROSSREFS

Sequence in context: A128835 A184064 A032311 * A032146 A032051 A085487

Adjacent sequences:  A032218 A032219 A032220 * A032222 A032223 A032224

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 23 22:57 EST 2018. Contains 299595 sequences. (Running on oeis4.)