Sum of primes = 2 mod 3 dividing n.

Terms

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