Sum of squares of primes = 3 mod 4 dividing n.

Terms

a(0) =0a(1) =0a(2) =9a(3) =0a(4) =0a(5) =9a(6) =49a(7) =0a(8) =9a(9) =0a(10) =121a(11) =9a(12) =0a(13) =49a(14) =9a(15) =0a(16) =0a(17) =9a(18) =361a(19) =0a(20) =58a(21) =121a(22) =529a(23) =9a(24) =0a(25) =0a(26) =9a(27) =49a(28) =0a(29) =9