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 A373563 #14 Aug 20 2024 09:14:38
%S A373563 1,8,5,4,7,2,7,0,6,8,2,1,8,4,1,0,5,9,2,2,4,9,0,1,1,6,4,5,0,9,6,4,1,6,
%T A373563 5,4,6,1,1,3,0,1,8,4,3,6,1,3,5,2,1,3,9,5,7,7,4,5,6,6,1,7,2,6,9,5,5,1,
%U A373563 5,9,8,1,8,3,1,9,6,9,9,9,8,0,9,6,5,0,4,0,0,8,8,9,3,0
%N A373563 Decimal expansion of Sum_{k>=0} (-1)^(k+1)* log(4k+1)/(4k+1) .
%F A373563 Equals A373564 - A242011.
%e A373563 0.1854727068218410592249011645096416546113...
%o A373563 (PARI) sumalt(k = 0, (-1)^(k+1) * log(4*k+1)/(4*k+1)) \\ _Amiram Eldar_, Aug 20 2024
%Y A373563 Cf. A373564, A242011.
%K A373563 nonn,cons
%O A373563 0,2
%A A373563 _R. J. Mathar_, Jun 10 2024