Indices (i.e., value of A000720 = primepi) of primes in A111870.

Terms

a(0) =1a(1) =2a(2) =4a(3) =30a(4) =189a(5) =217a(6) =2225a(7) =3385a(8) =14357a(9) =30802a(10) =31545a(11) =104071a(12) =149689a(13) =1094421a(14) =1319945a(15) =10655462a(16) =23163298a(17) =112228683a(18) =182837804a(19) =203615628a(20) =486570087a(21) =1094330259a(22) =11992433550a(23) =17883926781a(24) =50070452577a(25) =52302956123a(26) =72178455400a(27) =94906079600a(28) =473258870471a(29) =662221289043