a(n) = prime(3*n) mod prime(n).

Terms

a(0) =1a(1) =1a(2) =3a(3) =2a(4) =3a(5) =9a(6) =5a(7) =13a(8) =11a(9) =26a(10) =13a(11) =3a(12) =3a(13) =9a(14) =9a(15) =11a(16) =56a(17) =7a(18) =1a(19) =68a(20) =15a(21) =1a(22) =15a(23) =3a(24) =88a(25) =94a(26) =7a(27) =5a(28) =13a(29) =11