a(1) = 1, then LCM of consecutive composite numbers sandwiched between primes.

Terms

a(0) =1a(1) =2a(2) =1a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =360a(9) =11a(10) =12a(11) =13a(12) =1680a(13) =17a(14) =18a(15) =19a(16) =4620a(17) =23a(18) =491400a(19) =29a(20) =30a(21) =31a(22) =1884960a(23) =37a(24) =29640a(25) =41a(26) =42a(27) =43a(28) =45540a(29) =47