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.
%I A211879 #19 Feb 20 2014 08:54:59
%S A211879 1,2,3,3,8,8,8,1,4,0,3,3,7,2,7,4,1,8,8,7,5,3,5,4,7,9,2,7,3,0,8,8,6,4,
%T A211879 1,1,5,5,0,4,7,8,2,1,4,0,1,0,9,1,2,4,2,8,9,3,1,7,6,7,7,4,8,4,5,0,7,9,
%U A211879 9,9,0,5,6,1,9,7,8,0,3,7,4,5,5,2,7,0,9,4,0,7,6,3,9,5,5,0,8,0,1,0,8,5,8,5,0,8,6,5,6,3,7,0,1,2,5,4
%N A211879 Decimal expansion of constant C such that 1 = Sum_{k>=1} 1/C^(k^3).
%e A211879 C = 1.2338881403372741887535479273...
%p A211879 Digits:= 120:
%p A211879 s:= convert(fsolve(sum(1/C^(k^3), k=1..infinity)=1, C=2)/10, string):
%p A211879 seq(parse(s[n+1]), n=1..116); # _Alois P. Heinz_, Feb 13 2013
%t A211879 digits = 116; f[x_?NumericQ] := NSum[1/x^(k^3), {k, 1, Infinity}, WorkingPrecision -> digits]; x /. FindRoot[f[x] == 1, {x, 3/2, 1, 2}, WorkingPrecision -> digits] // RealDigits[#, 10, digits]& // First (* _Jean-François Alcover_, Feb 20 2014 *)
%Y A211879 Cf. A078975
%K A211879 cons,nonn
%O A211879 1,2
%A A211879 _Balarka Sen_ and _Jimmy Zotos_, Feb 13 2013
%E A211879 More terms from _Alois P. Heinz_, Feb 13 2013