a(n) = Product_{i=prime(n)..prime(n+1)-1} i.

Terms

a(0) =2a(1) =12a(2) =30a(3) =5040a(4) =132a(5) =43680a(6) =306a(7) =175560a(8) =271252800a(9) =870a(10) =1402410240a(11) =2193360a(12) =1722a(13) =3916440a(14) =14658134400a(15) =29142257760a(16) =3540a(17) =65418312960a(18) =22005480a(19) =5112a(20) =184933148400a(21) =41977440a(22) =390190489920a(24) =94109400a(25) =10302a(26) =119224560a(27) =11556a(28) =149059680a(30) =272613120