%I A118455
%S A118455 1,2,6,18,90,450,3150,22050,154350,1080450,11884950,130734450,
%T A118455 1699547850,22094122050,287223586650,3733906626450,63476412649650,
%U A118455 1079099015044050,20502881285836950,389554744430902050
%N A118455 a(1)=1, a(n) = product{k=2..n}P(k), where P(k) is the largest prime <= 
               k.
%H A118455 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%e A118455 a(6)=450 because the largest primes that do not exceed 2,3,4,5 and 6 
               are, respectively 2,3,3,5 and 5, having product 2*3*3*5*5=450.
%p A118455 a:=proc(n) if n=1 then 1 else product(prevprime(k+1),k=2..n) fi end: 
               seq(a(n),n=1..23); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Apr 
               30 2006
%Y A118455 Cf. A118456, A002110, A034386.
%Y A118455 Sequence in context: A007869 A118476 A144557 this_sequence A165774 A053505 
               A000138
%Y A118455 Adjacent sequences: A118452 A118453 A118454 this_sequence A118456 A118457 
               A118458
%K A118455 easy,nonn
%O A118455 1,2
%A A118455 Leroy Quet Apr 28 2006
%E A118455 More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Apr 30 2006