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A116874 Generalized Catalan numbers C(2,4;n)=C(4,2;n). 0
1, 1, 6, 76, 1336, 27696, 631776, 15327936, 388158336, 10143429376, 271514492416, 7406771137536, 205171931723776, 5755684861259776, 163186022760308736, 4668631322653802496, 134608711249014521856 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

See A116873 for C(2,3;n) and the Derrida et al., Schuetz-Domany and Liggett references.

FORMULA

G.f.: (3+17*x+40*x^2*c(8*x))/((1+4*x)*(3+2*x)) with the g.f. c(x) for A000108 (Catalan numbers).

CROSSREFS

Sequence in context: A155643 A066797 A120593 * A030044 A145165 A132613

Adjacent sequences:  A116871 A116872 A116873 * A116875 A116876 A116877

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Mar 24 2006

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Last modified February 15 07:42 EST 2012. Contains 205717 sequences.