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 A081526 #7 Nov 12 2019 23:47:38 %S A081526 1,2,3,12,10,20,35,280,252,2520,2310 %N A081526 Erroneous version of A027611. %F A081526 n! / gcd(A001705(n), n!). Note: A001705 starts with n=0 - _Martin Fuller_, Jan 03 2006 %Y A081526 Cf. A001705. %K A081526 dead %O A081526 1,2 %E A081526 Corrected and extended by _Martin Fuller_, Jan 03 2006