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 A233438 #6 Dec 21 2013 03:45:52 %S A233438 0,2,6,30,210,2310,30030,510510,9699690,223092870,6469693230, %T A233438 200560490130,2153462358810,72490129383210,1958274892758030, %U A233438 58665460642891410,50035643372444730,19221664375883039070,1123712842678138983270,27456249893723439879090,350421246400567367415390 %N A233438 Primorial(n) mod compositorial(n), that is, A002110(n) mod A036691(n). %C A233438 The sequence of numbers k such that a(k) > a(k+1) begins: 15, 42, 645, 805, 1566, 5430, 53698, ... %F A233438 a(n) = A002110(n) mod A036691(n). %o A233438 (PARI) a(n)=my(c,p,N);N=n;c=4;p=1;while(n>0,if(!isprime(c),p=p*c;n=n-1);c=c+1);prod(i=1,N,prime(i))%p \\ _Ralf Stephan_, Dec 21 2013 %Y A233438 Cf. A002110, A036691, A233437, A233448. %K A233438 nonn %O A233438 0,2 %A A233438 _Alex Ratushnyak_, Dec 09 2013