a(n) = prime(n) mod (n-1).

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =3a(5) =5a(6) =5a(7) =7a(8) =2a(9) =1a(10) =4a(11) =5a(12) =4a(13) =5a(14) =8a(15) =11a(16) =10a(17) =13a(18) =14a(19) =13a(20) =16a(21) =17a(22) =20a(23) =1a(24) =1a(25) =25a(26) =26a(27) =25a(28) =26a(29) =7