a(n) = Sum_{d|n} Kronecker(-36, d).

Terms

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