a(n) = n-th prime modulo 6.

Terms

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