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A054369 Number of unlabeled 7-ary cacti having n polygons. 0
1, 1, 7, 28, 231, 2100, 23884, 285390, 3626295, 47813815, 650367788 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

REFERENCES

Miklos Bona, Michel Bousquet, Gilbert Labelle, Pierre Leroux, Enumeration of m-ary cacti, Advances in Applied Mathematics, 24 (2000), 22-56.

LINKS

Index entries for sequences related to cacti

Bona-Bousquet-Labelle-Leroux paper.

Bona-Bousquet-Labelle-Leroux paper (dvi)

CROSSREFS

Sequence in context: A026664 A203296 A058822 * A198028 A203209 A193288

Adjacent sequences:  A054366 A054367 A054368 * A054370 A054371 A054372

KEYWORD

nonn

AUTHOR

Simon Plouffe (simon.plouffe(AT)gmail.com)

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Last modified February 16 19:23 EST 2012. Contains 205945 sequences.