Where prime(n) first appears in A307730.

Terms

a(0) =2a(1) =4a(2) =47a(3) =52a(4) =1374a(5) =1385a(6) =3738a(7) =3755a(8) =6680a(9) =6703a(10) =84626a(11) =84657a(12) =89480a(13) =89521a(14) =91832a(15) =91879a(16) =173092a(17) =173151a(18) =192882a(19) =192949a(20) =524587a(21) =524660a(22) =865301a(23) =865384a(24) =876543a(25) =876640a(26) =890479a(27) =890582a(28) =904273a(29) =904382