Numbers k such that k and k^2 use only the digits 1, 2, 3, 5 and 8.

Terms

a(0) =1a(1) =5a(2) =11a(3) =15a(4) =35a(5) =111a(6) =115a(7) =135a(8) =235a(9) =285a(10) =335a(11) =1135a(12) =1235a(13) =1511a(14) =1585a(15) =1885a(16) =2285a(17) =2885a(18) =3335a(19) =3515a(20) =3585a(21) =12335a(22) =12385a(23) =12585a(24) =15885a(25) =18115a(26) =18235a(27) =23135a(28) =33335a(29) =33515