The product of the positive integers <= n that are strongly prime to n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =1a(7) =20a(8) =15a(9) =35a(10) =7a(11) =36288a(12) =35a(13) =277200a(14) =1485a(15) =4576a(16) =9009a(17) =20432412000a(18) =5005a(20) =459459a(21) =5912192a(22) =2834325a(24) =1616615a(26) =4865140665