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A052393 Number of unlabeled ternary cacti having n triangles. 0
1, 1, 3, 6, 19, 57, 258, 1110, 5475, 27429, 143379, 764970, 4173906 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

LINKS

Index entries for sequences related to cacti

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

CROSSREFS

Sequence in context: A148570 A148571 A148572 * A024607 A186022 A058818

Adjacent sequences:  A052390 A052391 A052392 * A052394 A052395 A052396

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 05:32 EST 2012. Contains 205860 sequences.