Number of solutions to x^3 + y^3 + z^3 + t^3 == 0 (mod n) for 1 <= x, y, z, t <= n.

Terms

a(0) =1a(1) =8a(2) =27a(3) =72a(4) =125a(5) =216a(6) =595a(7) =704a(8) =1539a(9) =1000a(10) =1331a(11) =1944a(12) =3133a(13) =4760a(14) =3375a(15) =5632a(16) =4913a(17) =12312a(18) =8911a(19) =9000a(20) =16065a(21) =10648a(22) =12167a(23) =19008a(24) =16125a(25) =25064a(26) =45927a(27) =42840a(28) =24389a(29) =27000