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 A373809 #16 Aug 19 2024 02:36:57
%S A373809 7,4,1,5,9,7,8,5,4,9,8,2,8,0,5,0,0,3,0,2,3,9,4,0,3,2,7,5,4,5,0,3,7,5,
%T A373809 4,1,3,2,1,6,1,4,0,5,6,8,6,9,3,5,9,6,2,7,0,1,7,4,5,8,2,9,4,3,3,8,6,5,
%U A373809 3,6,4,5,7,0,6,8,0,0,0,0,2,5,7,1,3,8,3,3,7,2,4,3,0,5,6,2,5,6,3,5,2,9,5,8,2
%N A373809 Decimal expansion of the second derivative P''(2) of the prime zeta function at 2.
%H A373809 Tengiz O. Gogoberidze, <a href="https://arxiv.org/abs/2407.12047">Baker's dozen digits of two sums involving reciprocal products of an integer and its greatest prime factor</a>, arXiv:2407.12047 [math.GM], 2024, Table 2, s=2.
%F A373809 Equals Sum_{primes = 2,3,5,7,...} log(p)^2/p^2.
%e A373809 0.74159785498280500302394032754503754132161405686935...
%t A373809 $MaxExtraPrecision = 200; RealDigits[N[PrimeZetaP''[2], 120]][[1]] (* _Amiram Eldar_, Aug 19 2024 *)
%Y A373809 Cf. A085548 (P(2)), A136271 (P'(2)).
%K A373809 nonn,cons
%O A373809 0,1
%A A373809 _R. J. Mathar_, Aug 18 2024
%E A373809 More terms from _Amiram Eldar_, Aug 19 2024