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 A086726 #8 Apr 30 2015 09:53:26
%S A086726 0,4,5,6,9,2,6,1,2,9,6,8,0,0,6,2,8,9,9,0,2,0,1,1,5,3,2,4,0,6,8,3,4,0,
%T A086726 3,3,0,3,3,8,5,9,7,1,9,4,7,7,9,6,6,6,2,3,2,7,0,4,3,2,1,7,3,0,3,8,0,5,
%U A086726 5,7,6,3,0,6,6,7,5,5,5,7,9,8,2,8,7,1,1,9,1,3,9,0,6,1,0,4,4,0,8
%N A086726 Decimal expansion of sum(1/(6*m)^2,m=1..infinity).
%D A086726 L. Fejes Toth, Lagerungen in der Ebene, auf der Kugel und im Raum, 2nd. ed., Springer-Verlag, Berlin, Heidelberg 1972; see p. 213.
%F A086726 Pi^2/216.
%e A086726 .0456926129680062899...
%t A086726 Join[{0},RealDigits[Pi^2/216,10,120][[1]]] (* _Harvey P. Dale_, Apr 30 2015 *)
%Y A086726 Cf. A086722-A086731.
%K A086726 nonn,cons
%O A086726 0,2
%A A086726 _N. J. A. Sloane_, Jul 31 2003