Numbers k such that k and k^2 use only the digits 1, 2, 6 and 9.
A137017
Numbers k such that k and k^2 use only the digits 1, 2, 6 and 9.
Terms
- a(0) =1a(1) =11a(2) =96a(3) =1619a(4) =126969
External references
- oeis: A137017
A137017
Numbers k such that k and k^2 use only the digits 1, 2, 6 and 9.