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A069986 Denominator of b(n)=binomial(2n,n)^3*(42n+5)/2^(12n+4). 1
16, 8192, 33554432, 17179869184, 562949953421312, 288230376151711744, 1180591620717411303424, 604462909807314587353088, 158456325028528675187087900672, 81129638414606681695789005144064 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..9.

FORMULA

sum(n>=1, b(n))=1/Pi (Ramanujan)

CROSSREFS

Cf. A069985.

Sequence in context: A203390 A221085 A280845 * A265177 A151641 A265240

Adjacent sequences:  A069983 A069984 A069985 * A069987 A069988 A069989

KEYWORD

easy,frac,nonn

AUTHOR

Benoit Cloitre, May 01 2002

STATUS

approved

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Last modified March 25 13:36 EDT 2017. Contains 284081 sequences.