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 A247003 #15 Sep 15 2021 05:37:10
%S A247003 1,3,9,7,6,4,9,0,0,5,0,8,3,6,5,0,2,8,5,0,6,5,0,7,4,5,9,8,5,2,6,7,9,1,
%T A247003 1,5,9,0,0,7,8,1,1,4,2,9,4,4,0,7,2,8,9,9,6,4,8,3,8,7,4,0,4,8,8,5,4,6,
%U A247003 6,5,7,2,0,6,6,0,8,3,3,8,5,7,8,2,0,7,5,7,3,3,2,3,3,1,0,2,4,8,2,0,4,0,0,1,5
%N A247003 Decimal expansion of a constant related to A034691.
%H A247003 Vaclav Kotesovec, <a href="http://oeis.org/A034691/a034691_1.pdf">Asymptotics of sequence A034691</a>
%F A247003 Equals exp( Sum_{k>=2} 1/(k*(2^k-2)) ).
%e A247003 1.397649005083650285065074598526791159007811429440728996483874...
%p A247003 evalf(exp(sum(1/(k*(2^k-2)), k=2..infinity)), 100)
%Y A247003 Cf. A034691, A034899, A261043, A304962, A319918.
%K A247003 nonn,cons
%O A247003 1,2
%A A247003 _Vaclav Kotesovec_, Sep 09 2014