OFFSET
1,4
COMMENTS
See the second comment of A220086.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
Equals Pi*csc(Pi/7)/A220086, where csc is the cosecant function.
MATHEMATICA
RealDigits[Gamma[6/7], 10, 90][[1]]
PROG
(Maxima) fpprec:90; ev(bfloat(gamma(6/7)));
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Bruno Berselli, Dec 17 2012
STATUS
approved