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 A351687 #26 May 06 2022 03:05:17 %S A351687 1,0,7,6,9,0,1,0,2,7,8,5,8,6,3,1,4,7,1,9,9,7,3,7,4,8,2,0,7,3,3,2,8,7, %T A351687 9,3,8,2,9,4,8,1,2,6,4,6,7,7,7,6,4,1,6,1,1,6,9,8,7,9,4,7,8,9,6,4,4,2, %U A351687 1,7,4,1,1,1,1,4,0,4,3,6,6,6,6,9,7,1,8,3,7,5,3,9,5,7,9,0 %N A351687 Decimal expansion of Sum_{n>=2} (-1)^n/log(n!). %C A351687 This series is convergent according to the alternating series test, while series Sum_{n>=2} 1/log(n!) -> infinity (link). %H A351687 Socratic Q&A, <a href="https://socratic.org/questions/how-do-you-test-the-series-sigma-1-ln-n-from-n-is-2-oo-for-convergence">How do you test the Series Sum_{n>=2} 1/log(n!) for convergence?</a> %F A351687 Equals Sum_{k>=2} (-1)^k/log(k!). %e A351687 1.0769010278586314719973748207332879382948126467776416116987... %p A351687 evalf(sum((-1)^n / log(n!),n=2..infinity),120); %t A351687 RealDigits[NSum[(-1)^k/Log[k!], {k, 2, Infinity}, WorkingPrecision -> 120, Method -> "AlternatingSigns"]][[1]] (* _Amiram Eldar_, May 05 2022 *) %o A351687 (PARI) sumalt(k=2, (-1)^k/log(k!)) \\ _Vaclav Kotesovec_, May 05 2022 %Y A351687 Cf. A099769 (Sum_{n>=2} (-1)^n/log(n)). %Y A351687 Cf. A099871, A257898, A257960, A336741. %K A351687 nonn,cons %O A351687 1,3 %A A351687 _Bernard Schott_, May 05 2022