OFFSET
0,2
COMMENTS
Fuss-Catalan sequence is a(n,p,r) = r*binomial(np+r,n)/(np+r), where p=9, r=4.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
J-C. Aval, Multivariate Fuss-Catalan Numbers, arXiv:0711.0906v1, Discrete Math., 308 (2008), 4660-4669.
Thomas A. Dowling, Catalan Numbers Chapter 7
Wojciech Mlotkowski, Fuss-Catalan Numbers in Noncommutative Probability, Docum. Mathm. 15: 939-955.
FORMULA
G.f. satisfies: B(x) = {1 + x*B(x)^(p/r)}^r, where p=9, r=4.
MATHEMATICA
Table[4 Binomial[9 n + 4, n]/(9 n + 4), {n, 0, 30}]
PROG
(PARI) a(n) = 4*binomial(9*n+4, n)/(9*n+4);
(PARI) {a(n)=local(B=1); for(i=0, n, B=(1+x*B^(9/1))^1+x*O(x^n)); polcoeff(B, n)}
(Magma) [1*Binomial(9*n+1, n)/(9*n+1): n in [0..30]];
CROSSREFS
KEYWORD
nonn
AUTHOR
Tim Fulford, Dec 27 2013
STATUS
approved