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 A123732 #13 Aug 26 2022 05:25:51
%S A123732 1,4,6,4,0,0,3,5,4,3,6,0,3,1,8,2,0,2,5,9,3,8,4,2,4,8,9,4,3,4,5,4,2,7,
%T A123732 0,8,9,8,3,9,6,1,9,9,5,7,9,4,9,4,5,6,7,6,8,3,0,5,3,5,6,4,5,9,0,5,4,7,
%U A123732 2,8,9,5,4,8,5,0,5,8,5,3,9,9,7,8,8,4,9,2,3,6,7,4,5,1,2,6,2,6,6,0,6,2,3,3,3
%N A123732 Decimal expansion of Sum_{m>=1} (-1)Sigma(m)/m^3.
%C A123732 The sum over (-1)Sigma(m)/m^2 is divergent.
%F A123732 Equals Sum_{m>=1} A049060(m)/m^3.
%F A123732 Equals Product_{p prime} (1 + (p^3-p^2+1)/((p-1)^2*(p+1)*(p^2+p+1))). - _Amiram Eldar_, Aug 26 2022
%e A123732 1.46400354360318202593842489434542708983961995794945...
%o A123732 (PARI) prodeulerrat(1 + (p^3-p^2+1)/((p-1)^2*(p+1)*(p^2+p+1))) \\ _Amiram Eldar_, Aug 26 2022
%Y A123732 Cf. A049060, A123733, A123734, A183699.
%K A123732 nonn,cons
%O A123732 1,2
%A A123732 _Yasutoshi Kohmoto_, Nov 18 2006
%E A123732 40 more digits from _R. J. Mathar_, Dec 19 2010
%E A123732 More terms from _Amiram Eldar_, Aug 26 2022