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 A164857 #11 Aug 27 2022 03:15:24 %S A164857 1,2,12,4,30,6,5040,8,90,240240,360360,12,2346549004800,210,240,16, %T A164857 19275223968000,18,46113021921146019840000,420, %U A164857 214978908196382744494080000,10237090866494416404480000 %N A164857 a(n) = A164798(n)/(n-1)!. %C A164857 Each term a(n) is divisible by every prime from 2 to the largest prime dividing a(n). I.e., all terms are in sequence A055932. %Y A164857 Cf. A055932, A164798, A164799, A164858. %K A164857 nonn %O A164857 1,2 %A A164857 _Leroy Quet_, Aug 28 2009 %E A164857 Extended by _Ray Chandler_, Mar 14 2010