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 A340442 #18 Mar 27 2024 20:15:27 %S A340442 2,3,9,7,4,6,9,1,7,3,0,5,3,8,7,1,8,4,2,4,4,1,7,6,5,4,9,8,3,8,8,8,1,2, %T A340442 9,9,5,5,0,9,2,7,2,9,5,5,4,2,9,1,1,6,9,7,8,1,2,9,9,9,0,4,1,5,4,9,1,8, %U A340442 4,0,9,4,3,5,6,8,5,0,4,8,1,1,5,1,7,7,1,7,7,9,3,4,0,2,6,0,3,7,9,5,7,8,8,0,9 %N A340442 Decimal expansion of zeta''(3), the second derivative of the Riemann zeta function at 3. %F A340442 Equals Sum_{k>=1} log(k)^2/k^3. - _Amiram Eldar_, May 28 2021 %e A340442 0.239746917305387184244176549838881... %p A340442 evalf(Zeta(2,3.0),100) ; %t A340442 RealDigits[Zeta''[3], 10, 100][[1]] (* _Amiram Eldar_, May 28 2021 *) %o A340442 (PARI) zeta''(3) \\ _Michel Marcus_, Jan 07 2021 %Y A340442 Cf. A201994, A340443. %K A340442 nonn,cons %O A340442 0,1 %A A340442 _R. J. Mathar_, Jan 07 2021