Numbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 6.

Terms

a(0) =0a(1) =5a(2) =6a(3) =25a(4) =50a(5) =55a(6) =60a(7) =225a(8) =235a(9) =250a(10) =255a(11) =256a(12) =500a(13) =505a(14) =506a(15) =550a(16) =566a(17) =600a(18) =605a(19) =2250a(20) =2350a(21) =2500a(22) =2550a(23) =2560a(24) =5000a(25) =5005a(26) =5006a(27) =5025a(28) =5050a(29) =5055