Numbers k such that k and k^2 use only the digits 2, 5, 6 and 9.
A137115
Numbers k such that k and k^2 use only the digits 2, 5, 6 and 9.
Terms
- a(0) =5a(1) =25a(2) =22925a(3) =22955665
External references
- oeis: A137115
A137115
Numbers k such that k and k^2 use only the digits 2, 5, 6 and 9.