a(n)= product of all odd composite numbers between n-th prime and (n+1)-st prime.

Terms

a(0) =1a(1) =1a(2) =1a(3) =9a(4) =1a(5) =15a(6) =1a(7) =21a(8) =675a(9) =1a(10) =1155a(11) =39a(12) =1a(13) =45a(14) =2499a(15) =3135a(16) =1a(17) =4095a(18) =69a(19) =1a(20) =5775a(21) =81a(22) =7395a(23) =803985a(24) =99a(25) =1a(26) =105a(27) =1a(28) =111a(30) =129