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 A277775 #15 Dec 01 2024 10:04:08
%S A277775 8,3,7,1,1,3,2,1,2,4,1,1
%N A277775 Decimal expansion of the prime triples constant, also known as Brun's constant B_{3b} = Sum (1/p + 1/(p+4) + 1/(p+6)) as p runs through the initial members of prime triples A022005.
%D A277775 Steven R. Finch, Mathematical Constants, Encyclopedia of Mathematics and its Applications, vol. 94, Cambridge University Press, 2003, Section 2.14, p. 133.
%H A277775 Thomas R. Nicely, <a href="https://faculty.lynchburg.edu/~nicely/counts.html">Prime Constellations Research Project</a> (Mar 16 2010).
%e A277775 0.837113212411...
%Y A277775 Cf. A022005, A065421, A194098, A213007, A277774.
%K A277775 nonn,cons,hard,more
%O A277775 0,1
%A A277775 _Martin Renner_, Oct 29 2016
%E A277775 Offset corrected by _Rick L. Shepherd_, Nov 03 2016