Index of first occurrence of n-th prime in A307720.

Terms

a(0) =3a(1) =5a(2) =47a(3) =53a(4) =1374a(5) =1386a(6) =3738a(7) =3756a(8) =6680a(9) =6704a(10) =84626a(11) =84658a(12) =89480a(13) =89522a(14) =91832a(15) =91880a(16) =173092a(17) =173152a(18) =192882a(19) =192950a(20) =524587a(21) =524661a(22) =865301a(23) =865385a(24) =876543a(25) =876641a(26) =890479a(27) =890583a(28) =904273a(29) =904383