OFFSET
0,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 0..555
Srinivasa Ramanujan, Modular equations and approximations to Pi, Quart. J. Math., Vol. 45 (1914), pp. 350-372. See p. 45, eq. (29).
FORMULA
Sum_{n>=0} b(n) = 1/Pi (Ramanujan, 1914).
EXAMPLE
Fractions begin with 5/16, 47/8192, 2403/33554432, 16375/17179869184, 7417375/562949953421312, 53760105/288230376151711744, ...
MATHEMATICA
a[n_] := Numerator[Binomial[2 n, n]^3*(42 n + 5)/2^(12 n + 4)]; Array[a, 15, 0] (* Amiram Eldar, Apr 29 2022 *)
CROSSREFS
KEYWORD
easy,frac,nonn
AUTHOR
Benoit Cloitre, May 01 2002
STATUS
approved