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 A241560 #32 Mar 21 2021 12:44:45
%S A241560 9,2,8,8,3,5,8,2,7,1,3
%N A241560 Decimal expansion of the sum of the reciprocals of the averages of the twin prime pairs.
%C A241560 This constant is due to JJGJJG, see link section.
%C A241560 Denominators are in A014574.
%H A241560 JJGJJG, <a href="http://gaussianos.com/la-constante-entre-primos-gemelos">La constante entre primos gemelos</a>, gaussianos, Apr 06 2014.
%e A241560 0.92883582713... = Sum_{k>=1} 1/A014574(k) = 1/4 + 1/6 + 1/12 + 1/18 + 1/30 + 1/42 + ...
%Y A241560 Cf. A001097, A014574, A065421, A077800.
%K A241560 nonn,cons,more
%O A241560 0,1
%A A241560 _Omar E. Pol_, May 07 2014