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 A038035 Number of labeled dyslexic planted planar trees with n+1 nodes. 2
 1, 2, 9, 72, 840, 12780, 238770, 5281920, 134946000, 3909578400, 126638542800, 4535037460800, 177904622095200, 7586967310322400, 349479111223242000, 17292052928037888000, 914673660594613920000, 51506610632458293312000, 3076341001739003430432000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Andrew Howroyd, Table of n, a(n) for n = 1..200 C. G. Bower, Transforms (2) FORMULA Divides by n and shifts left under "BIJ" (reversible, indistinct, labeled) transform. E.g.f.: series reversion of 2*x*(1 - x)/(2 - x^2). - Andrew Howroyd, Sep 19 2018 MATHEMATICA m = 20; CoefficientList[InverseSeries[2*x*(1 - x)/(2 - x^2) + O[x]^m], x]*Range[0, m - 1]! // Rest (* Jean-François Alcover, Sep 08 2019 *) PROG (PARI) Vec(serlaplace(serreverse(2*x*(1 - x)/(2 - x^2) + O(x^20)))) \\ Andrew Howroyd, Sep 19 2018 CROSSREFS Cf. A005470, A032128. Sequence in context: A258114 A133941 A240956 * A133984 A208898 A108995 Adjacent sequences:  A038032 A038033 A038034 * A038036 A038037 A038038 KEYWORD nonn,eigen AUTHOR Christian G. Bower, Sep 15 1998 EXTENSIONS Terms a(16) and beyond from Andrew Howroyd, Sep 19 2018 STATUS approved

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Last modified September 19 16:34 EDT 2021. Contains 347564 sequences. (Running on oeis4.)