Numbers k such that k and k^2 use only the digits 0, 4, 5, 6 and 9.
A136950
Numbers k such that k and k^2 use only the digits 0, 4, 5, 6 and 9.
Terms
- a(0) =0a(1) =64a(2) =640a(3) =6400a(4) =64000a(5) =640000a(6) =6400000a(7) =64000000a(8) =640000000a(9) =6400000000a(10) =64000000000a(11) =640000000000
External references
- oeis: A136950