Sum of squares of primes = 1 mod 3 dividing n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =49a(7) =0a(8) =0a(9) =0a(10) =0a(11) =0a(12) =169a(13) =49a(14) =0a(15) =0a(16) =0a(17) =0a(18) =361a(19) =0a(20) =49a(21) =0a(22) =0a(23) =0a(24) =0a(25) =169a(26) =0a(27) =49a(28) =0a(29) =0