a(n) is the binary XOR of all n-bit prime numbers.

Terms

a(0) =0a(1) =1a(2) =2a(3) =6a(4) =23a(5) =59a(6) =99a(7) =203a(8) =469a(9) =807a(10) =1615a(11) =3349a(12) =2266a(13) =4576a(14) =14042a(15) =25002a(16) =89193a(17) =131215a(18) =135904a(19) =814531a(20) =885682a(21) =60842a(22) =3969154a(23) =3370892a(24) =6742296a(25) =14350136a(26) =42766902a(27) =97565102a(28) =444197631a(29) =515121776