phi(n) + n is a cube.

Terms

a(0) =6a(1) =44a(2) =48a(3) =162a(4) =168a(5) =344a(6) =352a(7) =384a(8) =668a(9) =1296a(10) =1344a(11) =1832a(12) =2561a(13) =2732a(14) =2752a(15) =2816a(16) =2949a(17) =3072a(18) =4374a(19) =4392a(20) =4536a(21) =4680a(22) =5344a(23) =5901a(24) =9625a(25) =10368a(26) =10752a(27) =13160a(28) =14636a(29) =14656