Smallest prime factor of the n-th highly totient number (A097942(n)) plus 1.

Terms

a(0) =2a(1) =3a(2) =5a(3) =3a(4) =13a(5) =5a(6) =7a(7) =73a(8) =5a(9) =241a(10) =433a(11) =13a(12) =577a(13) =7a(14) =1153a(15) =11a(16) =43a(17) =29a(18) =7a(19) =8641a(20) =41a(21) =11a(22) =7a(23) =30241a(24) =17a(25) =61a(26) =47a(27) =31a(28) =13a(29) =11