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 A259838 #13 Mar 22 2023 08:15:27
%S A259838 1,6,2,2,6,2,1,5,6,4,4,8,2,0,2,9,5,9,8,3,0,8,6,6,8,0,7,6,1,0,8,9,3,1,
%T A259838 5,6,6,6,4,8,8,6,7,6,8,2,8,2,1,2,2,3,5,4,3,9,7,0,2,6,8,3,3,3,4,8,1,9,
%U A259838 9,7,0,3,9,9,4,5,6,0,5
%N A259838 Decimal expansion of Sum_{n>=0} 2^n/100^A055642(2^n).
%F A259838 Equals Sum_{n>=0} p/100^A055642(p) where p = A000079(n).
%e A259838 0.16226215644820295983086680761089...
%o A259838 (PARI) suminf(n=0, 2^n/100^#Str(2^n)) \\ _Charles R Greathouse IV_, Jul 06 2015
%Y A259838 Cf. A258718, A259837.
%K A259838 nonn,cons,base,easy
%O A259838 0,2
%A A259838 _R. J. Mathar_, Jul 06 2015