a(n) = floor( Product_{i=1..n} prime(i)/i ).

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =8a(5) =19a(6) =41a(7) =101a(8) =240a(9) =614a(10) =1782a(11) =5024a(12) =15492a(13) =48859a(14) =150069a(15) =470216a(16) =1557591a(17) =5405758a(18) =18319515a(19) =64600395a(20) =229331402a(21) =797199637a(22) =2862671427a(23) =10330509932a(24) =38308974332a(25) =148638820408