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 A116655 #8 Dec 04 2018 20:04:56 %S A116655 0,1,1,2,12,30,639,1835,64601,369518,12351620,78569754,5477440592, %T A116655 35108337731,3031753084624,30230571143624,3308601182539217, %U A116655 33507627807222128,5183154493935250901 %N A116655 Number of connected subgroups of the symmetric group S_n. %H A116655 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %F A116655 Logarithmic transform of A005432. %Y A116655 Labeled version of A005226. %K A116655 nonn,hard %O A116655 0,4 %A A116655 _Christian G. Bower_, Feb 23 2006 %E A116655 a(13)-a(18) added (using data from A005432) by _Alois P. Heinz_, Dec 04 2018