Beginning with 2, least prime not occurring earlier such that the concatenation of first n terms has the least prime factor prime(n).
A100759
Beginning with 2, least prime not occurring earlier such that the concatenation of first n terms has the least prime factor prime(n).
Terms
- a(0) =2a(1) =7a(2) =5a(3) =17a(4) =127a(5) =3a(6) =347a(7) =37a(8) =71a(9) =829a(10) =89a(11) =79a(12) =311a(13) =271a(14) =1103a(15) =823a(16) =827a(17) =7219a(18) =149a(19) =499a(20) =3947a(21) =6367a(22) =2861a(23) =3673a(24) =13781a(25) =2281a(26) =281a(27) =229a(28) =353a(29) =1597
External references
- oeis: A100759