Numbers k such that k and k^2 use only the digits 1, 3, 4, 5 and 9.
A137023
Numbers k such that k and k^2 use only the digits 1, 3, 4, 5 and 9.
Terms
- a(0) =1a(1) =3a(2) =393a(3) =115393a(4) =399143a(5) =141115393a(6) =9545449143
External references
- oeis: A137023