OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..115
FORMULA
a(n) = C(10*n-1, n-1)*C(100*n^2, 2)/(3*n*C(10*n+1, 3)), n > 0. - Gary Detlefs, Jan 02 2014
From Peter Bala, Feb 21 2022: (Start)
The o.g.f. A(x) is algebraic: (1 - A(x))*(1 + 9*A(x))^9 + (10^10)*x*A(x)^10 = 0.
Sum_{n >= 1} a(n)*( x*(9*x + 10)^9/(10^10*(1 + x)^10) )^n = x. (End)
PROG
(Magma) [Binomial(10*n, n): n in [0..50]]; // Vincenzo Librandi, Apr 21 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 07 2010
STATUS
approved