%I #5 Mar 30 2012 18:50:25
%S 1,8,11,92,1117,15676,281507,5603888,167362597,5328886012,
%T 222844337147,9761066934176,583589647901149,36052483750271224,
%U 2587390775195626139,190843701043052923832,19418598540473717052037
%N Numerator of Sum{1/A077800(k)|1<=k<=n}, denominator=A074043.
%C a(n)/A074043(n) -> Brun's constant (A065421).
%K nonn,frac
%O 1,2
%A _Reinhard Zumkeller_, Aug 13 2002
%E Definition corrected by _Max Alekseyev_, May 10 2009