a(n) = prime(n)^2 mod prime(n-1).

Terms

a(0) =1a(1) =1a(2) =4a(3) =2a(4) =4a(5) =3a(6) =4a(7) =16a(8) =13a(9) =4a(10) =5a(11) =16a(12) =4a(13) =16a(14) =36a(15) =36a(16) =4a(17) =36a(18) =16a(19) =4a(20) =36a(21) =16a(22) =36a(23) =64a(24) =16a(25) =4a(26) =16a(27) =4a(28) =16a(29) =83