Number of steps J. H. Conway's Fractran program needs to calculate the n-th prime.

Terms

a(0) =19a(1) =50a(2) =211a(3) =577a(4) =2083a(5) =3469a(6) =7361a(7) =10395a(8) =17915a(9) =35249a(10) =43188a(11) =72392a(12) =97236a(13) =113324a(14) =146556a(15) =209098a(16) =285307a(17) =317925a(18) =417234a(19) =494939a(20) =541264a(21) =684114a(22) =789130a(23) =968524a(24) =1249354a(25) =1408123a(26) =1500944a(27) =1679217a(28) =1781388a(29) =1980305