Substring of both its square and its cube.

Terms

a(0) =0a(1) =1a(2) =5a(3) =6a(4) =10a(5) =25a(6) =50a(7) =60a(8) =76a(9) =100a(10) =250a(11) =376a(12) =500a(13) =600a(14) =625a(15) =760a(16) =1000a(17) =2500a(18) =3760a(19) =5000a(20) =6000a(21) =6250a(22) =7600a(23) =9376a(24) =10000a(25) =25000a(26) =37600a(27) =50000a(28) =60000a(29) =62500