Internal digits of n^2 include digits of n as subsequence.

Terms

a(0) =50a(1) =60a(2) =250a(3) =500a(4) =600a(5) =760a(6) =1050a(7) =2050a(8) =2500a(9) =3050a(10) =3628a(11) =3710a(12) =3760a(13) =3792a(14) =4050a(15) =4410a(16) =5000a(17) =5010a(18) =5050a(19) =5060a(20) =5250a(21) =6000a(22) =6010a(23) =6050a(24) =6250a(25) =6760a(26) =7050a(27) =7560a(28) =7600a(29) =8050