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 A332905 #17 Mar 10 2020 17:51:34
%S A332905 4,8,3,0,5,7,1,8,1,1,2,5,9,0,9,5,6,4,9,3,2,1,6,9,7,9,8,5,2,5,6,0,3,8,
%T A332905 8,4,7,9,3,2,6,0,0,7,4,3,5,4,8,9,4,9,0,6,2,8,2,6,0,8,5,6,9,9,9,1,1,3,
%U A332905 8,6,2,6,0,5,0,6,9,3,1,1,7,1,0,3,5,5,9,2,2,2,3,4,1,7,9,5,3,6,3,6
%N A332905 Decimal expansion of Sum_{p prime, k>=1} 1 / 2^(p^k).
%C A332905 Prime power constant: binary expansion is the characteristic function of prime powers (A069513).
%e A332905 0.48305718112590956493... = (0.0111101110...)_2.
%e A332905 |||| |||
%e A332905 2345 789
%Y A332905 Cf. A051006, A069513, A246655, A333182.
%K A332905 nonn,cons
%O A332905 0,1
%A A332905 _Ilya Gutkovskiy_, Mar 10 2020