Numbers k such that k and k^2 use only the digits 1, 2, 3, 4 and 5.

Terms

a(0) =1a(1) =2a(2) =5a(3) =11a(4) =12a(5) =15a(6) =21a(7) =35a(8) =111a(9) =112a(10) =115a(11) =211a(12) =235a(13) =335a(14) =1111a(15) =1115a(16) =1235a(17) =1521a(18) =2132a(19) =2312a(20) =2335a(21) =3335a(22) =3512a(23) =3515a(24) =11111a(25) =11115a(26) =12335a(27) =12415a(28) =23335a(29) =33335