cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A108744 Decimal expansion of B = Sum_{ n > 0 } 1/A007559(n).

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%I A108744 #10 Sep 08 2013 13:30:43
%S A108744 1,2,8,9,5,7,8,5,5,6,3,7,2,7,4,1,0,4,7,1,2,0,0,4,8,0,0,0,4,4,6,1,5,0,
%T A108744 6,7,7,7,4,2,8,0,4,0,5,7,4,3,7,0,0,5,2,5,9,6,0,7,6,6,4,1,9,6,8,0,1,6,
%U A108744 3,7,8,9,2,4,4,3,6,1,0,3,5,8,3,9,8,6,7,4,5,9,0,3,8,3,8,4,3,0,0,9,3,4,8,7,8
%N A108744 Decimal expansion of B = Sum_{ n > 0 } 1/A007559(n).
%F A108744 A = B + C with A = Gamma(1/3)*(e/9)^(1/3) and C = 1/(1+2/(1+3/(1+5/(1+6/(1+8/(1+9/(1+11/(1+. .)))))))).
%e A108744 1.28957855637...
%t A108744 E^(1/3)*(Gamma[1/3] - Gamma[1/3, 1/3])/3^(2/3) // RealDigits[#, 10, 105]& // First (* _Jean-François Alcover_, Feb 22 2013 *)
%o A108744 (PARI) B=sum(n=1,100,1./prod(k=0,n-1,3*k+1)) /* _Paul D. Hanna_ */
%Y A108744 Cf. A108743, A108745.
%K A108744 nonn,cons
%O A108744 1,2
%A A108744 _Philippe Deléham_, Jun 22 2005
%E A108744 More terms from _Paul D. Hanna_, Jun 25 2005