Number of integer solutions to the equation x^2 + 3y^2 = n.

Terms

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