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A257589 (2n+1)^2*Catalan(n) 0
1, 9, 50, 245, 1134, 5082, 22308, 96525, 413270, 1755182, 7407036, 31097794, 130007500, 541574100, 2249204040, 9316746045, 38504502630, 158814867750, 653887380300, 2688007311990, 11034286426020, 45238127719980, 185252191371000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..22.

G.-S. Cheon, H. Kim, L. W. Shapiro, Mutation effects in ordered trees, arXiv preprint arXiv:1410.1249, 2014 (see page 10).

MATHEMATICA

Table[(2n+1)^2 CatalanNumber[n], {n, 0, 30}] (* Harvey P. Dale, Sep 02 2015 *)

CROSSREFS

Cf. A000108.

Sequence in context: A279979 A222993 A171480 * A231413 A007681 A279972

Adjacent sequences:  A257586 A257587 A257588 * A257590 A257591 A257592

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 10 2015

STATUS

approved

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Last modified March 21 10:13 EDT 2019. Contains 321368 sequences. (Running on oeis4.)