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 A233835 a(n) = 8*binomial(7*n + 8, n)/(7*n + 8). 12
 1, 8, 84, 1008, 13090, 179088, 2542512, 37106784, 553270671, 8391423040, 129058047580, 2008018827360, 31550226597162, 499892684834368, 7978140653296800, 128138773298754240, 2069603881026760323, 33593111381834512200, 547698081896206040800, 8965330544164089648000, 147285313888568167177866 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Fuss-Catalan sequence is a(n,p,r) = r*binomial(n*p + r, n)/(n*p + r); this is the case p = 7, r = 8. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 J-C. Aval, Multivariate Fuss-Catalan Numbers, arXiv:0711.0906 [math.CO], 2007. J-C. Aval, Multivariate Fuss-Catalan Numbers, 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. Wikipedia, Fuss-Catalan number FORMULA G.f. satisfies: A(x) = {1 + x*A(x)^(p/r)}^r, where p = 7, r = 8. From _Peter Bala, Oct 16 2015: (Start) O.g.f. A(x) = 1/x * series reversion (x*C(-x)^8), where C(x) = (1 - sqrt(1 - 4*x))/(2*x) is the o.g.f. for the Catalan numbers A000108. See cross-references for other Fuss-Catalan sequences with o.g.f. 1/x * series reversion (x*C(-x)^k), k = 3 through 11. A(x)^(1/8) is the o.g.f. for A002296. (End) MATHEMATICA Table[8 Binomial[7 n + 8, n]/(7 n + 8), {n, 0, 30}] PROG (PARI) a(n) = 8*binomial(7*n+8, n)/(7*n+8); (PARI) {a(n)=local(B=1); for(i=0, n, B=(1+x*B^(7/8))^8+x*O(x^n)); polcoeff(B, n)} (Magma) [8*Binomial(7*n+8, n)/(7*n+8): n in [0..30]]; CROSSREFS Cf. A000108, A002296, A233832, A233833, A143547, A233834, A233835, A233907, A233908. Cf. A000245 (k = 3), A006629 (k = 4), A196678 (k = 5), A233668 (k = 6), A233743 (k = 7), A234467 (k = 9), A232265 (k = 10), A229963 (k = 11). Sequence in context: A166483 A048665 A005797 * A300993 A052659 A346684 Adjacent sequences: A233832 A233833 A233834 * A233836 A233837 A233838 KEYWORD nonn,easy AUTHOR Tim Fulford, Dec 16 2013 STATUS approved

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