

A032119


Number of labeled seriesreduced dyslexic planted planar trees (root unlabeled) with n leaves.


1



1, 1, 6, 57, 750, 12645, 260190, 6322365, 177181830, 5625873225, 199608636150, 7826601269025, 336070622037150, 15684327120386925, 790493799998652750, 42790196611446409125, 2475921578709979149750, 152499324058939789556625, 9961887269457311273835750, 687922376268803482237055625
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OFFSET

1,3


LINKS

Andrew Howroyd, Table of n, a(n) for n = 1..200
C. G. Bower, Transforms (2)
Index entries for sequences related to rooted trees


FORMULA

Doubles (index 2+) under "BIJ" (reversible, indistinct, labeled) transform.
E.g.f.: series reversion of x*(2  3*x)/(2*(1x)).  Andrew Howroyd, Sep 19 2018


PROG

(PARI) Vec(serlaplace(serreverse(x*(2  3*x)/(2*(1x)) + O(x^20)))) \\ Andrew Howroyd, Sep 19 2018


CROSSREFS

Sequence in context: A107718 A000406 A305276 * A294511 A242817 A295238
Adjacent sequences: A032116 A032117 A032118 * A032120 A032121 A032122


KEYWORD

nonn,eigen


AUTHOR

Christian G. Bower


EXTENSIONS

Terms a(18) and beyond from Andrew Howroyd, Sep 19 2018


STATUS

approved



