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A032176 Functions of n points with no symmetries. 0
1, 1, 3, 6, 15, 34, 82, 193, 464, 1111, 2683, 6482, 15730, 38232, 93177, 227458, 556323, 1362639, 3342504, 8209130, 20185204, 49684404, 122413446, 301870406, 745019874, 1840103575, 4548008306, 11248190948 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

F. Bergeron, G. Labelle and P. Leroux, Combinatorial Species and Tree-Like Structures, Camb. 1998, p. 328. (4.4.31).

LINKS

Table of n, a(n) for n=1..28.

C. G. Bower, Transforms (2)

N. J. A. Sloane, Transforms

FORMULA

WEIGH transform of A032175. Also g.f. = (1-B(x^2))/(1-B(x)), B(x)=g.f. of A004111.

CROSSREFS

Cf. A001372.

Sequence in context: A006647 A032126 A190525 * A173992 A027600 A024416

Adjacent sequences:  A032173 A032174 A032175 * A032177 A032178 A032179

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified October 22 04:04 EDT 2018. Contains 316431 sequences. (Running on oeis4.)