%I A104141
%S A104141 3,0,3,9,6,3,5,5,0,9,2,7,0,1,3,3,1,4,3,3,1,6,3,8,3,8,9,6,2,9,1,8,2,9,
%T A104141 1,6,7,1,3,0,7,6,3,2,4,0,1,6,7,3,9,6,4,6,5,3,6,8,2,7,0,9,5,6,8,2,5,1,9,
%U A104141 3,6,2,8,8,6,7,0,6,3,2,3,5,7,3,6,2,7,8,2,1,7,7,6,8,6,5,5,1,2,8
%N A104141 Decimal expansion of 3/(pi)^2.
%C A104141 3/(pi)^2 is the limit of [sum_{k=1,...,n} phi(k)]/n^2, {phi(k) being 
               the Euler's totient A000010(k)},i.e., of A002088(n)/A000290(n) as 
               n tends to infinity.
%D A104141 L. E. Dickson, History of the Theory of Numbers, Vol. I pp. 126 Chelsea 
               NY 1966.
%e A104141 3/(pi)^2=0.303963550927013314331638389629...
%t A104141 l = RealDigits[N[3/Pi^2, 100]]; Prepend[First[l], Last[l]] (Propper)
%Y A104141 Sequence in context: A132330 A117078 A021333 this_sequence A060533 A157525 
               A157521
%Y A104141 Adjacent sequences: A104138 A104139 A104140 this_sequence A104142 A104143 
               A104144
%K A104141 nonn,cons
%O A104141 0,1
%A A104141 Lekraj Beedassy (blekraj(AT)yahoo.com), Mar 07 2005
%E A104141 More terms from Ryan Propper (rpropper(AT)stanford.edu), Aug 04 2005