Least common multiple of prime(n+1)-1 and prime(n)-1.

Terms

a(0) =2a(1) =4a(2) =12a(3) =30a(4) =60a(5) =48a(6) =144a(7) =198a(8) =308a(9) =420a(10) =180a(11) =360a(12) =840a(13) =966a(14) =1196a(15) =1508a(16) =1740a(17) =660a(18) =2310a(19) =2520a(20) =936a(21) =3198a(22) =3608a(23) =1056a(24) =2400a(25) =5100a(26) =5406a(27) =5724a(28) =3024a(29) =1008