OFFSET
1,1
PROG
(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); floor(p/N!) \\ Ralf Stephan, Dec 21 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Alex Ratushnyak, Dec 10 2013
STATUS
approved