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

Terms

a(0) =1a(1) =8a(2) =27a(3) =64a(4) =125a(5) =216a(6) =336a(7) =512a(8) =1296a(9) =1000a(10) =1331a(11) =1728a(12) =1794a(13) =2688a(14) =3375a(15) =4096a(16) =4913a(17) =10368a(18) =7410a(19) =8000a(20) =9072a(21) =10648a(22) =12167a(23) =13824a(24) =15625a(25) =14352a(26) =34992a(27) =21504a(28) =24389a(29) =27000