Number of integer solutions to the equation x^2 + 2*y^2 + 4*z^2 = n.

Terms

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