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

Terms

a(0) =2a(1) =4a(2) =16a(3) =15a(4) =56a(5) =40a(6) =222a(7) =58a(8) =392a(9) =30a(10) =187a(11) =38a(12) =944a(13) =1076a(14) =2069a(15) =1909a(16) =473a(17) =2197a(18) =671a(19) =143a(20) =4089a(21) =1502a(22) =3985a(23) =535a(24) =5530a(25) =9293a(26) =6078a(27) =1392a(28) =7304a(29) =9380