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A032220 Number of ways to partition n labeled elements into pie slices of different odd sizes, allowing the pie to be turned over. 2
1, 0, 1, 4, 1, 6, 1, 64, 505, 130, 1321, 1024, 13157, 2380, 395851, 17313664, 1639617, 73554666, 16100905, 919339264, 292018525, 18910614580, 1549052715, 1523900106304, 141366386526801, 9494469178116 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..26.

C. G. Bower, Transforms (2)

FORMULA

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

CROSSREFS

Sequence in context: A087652 A072195 A032310 * A032145 A032050 A057160

Adjacent sequences:  A032217 A032218 A032219 * A032221 A032222 A032223

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 24 13:14 EST 2018. Contains 299623 sequences. (Running on oeis4.)