A116877 Generalized Catalan numbers C(2,7;n)=C(7,2;n).

1, 1, 9, 193, 5881, 212529, 8467113, 359065953, 15899869785, 726714474385, 34027390026505, 1623911649356481, 78700579447559353, 3862817734061600497, 191625298483691960169, 9592547730682848672801, 483950907590044260965145

Offset

0,3

Comments

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

Links

Table of n, a(n) for n=0..16.

Formula

G.f.: (3+25*x+56*x^2*c(14*x))/((1+7*x)*(3+x)) with the g.f. c(x) for A000108 (Catalan numbers).

Crossrefs

Sequence in context: A184688 A189178 A297517 * A196959 A266485 A279132

Adjacent sequences: A116874 A116875 A116876 * A116878 A116879 A116880

Keyword

nonn,easy

Author

Wolfdieter Lang, Mar 24 2006

Status

approved