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 A136740 #9 Mar 01 2021 06:33:45 %S A136740 2,3,5,7,34522712143931,17,437,29 %N A136740 (0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3,..) becomes (2, 3, 5, 7, 11^13, 17, 19*23, 29, 31^37, 41^43, 47*53, 59, 61^67*71,..). %e A136740 a(5)=11^13=34522712142931. %e A136740 a(7)=19*23=437, %e A136740 etc. %Y A136740 Cf. A141269, A141270, A143652, A143653, A143666. %K A136740 nonn,less %O A136740 1,1 %A A136740 _Juri-Stepan Gerasimov_, Nov 08 2008 %E A136740 Corrected typo in a(5), inserted a(6). _R. J. Mathar_, Feb 21 2009