Numbers k such that k and k^2 use only the digits 1, 3, 6 and 8.
A137040
Numbers k such that k and k^2 use only the digits 1, 3, 6 and 8.
Terms
- a(0) =1a(1) =6a(2) =8131a(3) =116881a(4) =1366881
External references
- oeis: A137040
A137040
Numbers k such that k and k^2 use only the digits 1, 3, 6 and 8.