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A233438 Primorial(n) mod compositorial(n), that is, A002110(n) mod A036691(n). 0

%I

%S 0,2,6,30,210,2310,30030,510510,9699690,223092870,6469693230,

%T 200560490130,2153462358810,72490129383210,1958274892758030,

%U 58665460642891410,50035643372444730,19221664375883039070,1123712842678138983270,27456249893723439879090,350421246400567367415390

%N Primorial(n) mod compositorial(n), that is, A002110(n) mod A036691(n).

%C The sequence of numbers k such that a(k) > a(k+1) begins: 15, 42, 645, 805, 1566, 5430, 53698, ...

%F a(n) = A002110(n) mod A036691(n).

%o (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 Cf. A002110, A036691, A233437, A233448.

%K nonn

%O 0,2

%A _Alex Ratushnyak_, Dec 09 2013

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Last modified September 18 07:50 EDT 2019. Contains 327168 sequences. (Running on oeis4.)