n + sigma(n) + phi(n) is a cube.

Terms

a(0) =8a(1) =120a(2) =496a(3) =914a(4) =3940a(5) =4055a(6) =4252a(7) =8129a(8) =12092a(9) =13779a(10) =14291a(11) =28394a(12) =29948a(13) =41200a(14) =49469a(15) =55255a(16) =58538a(17) =68459a(18) =104512a(19) =114844a(20) =119303a(21) =135068a(22) =135074a(23) =152177a(24) =162127a(25) =170666a(26) =176705a(27) =190595a(28) =220714a(29) =253888