Numbers k such that k and k^2 use only the digits 0, 5, 6 and 7.
A136962
Numbers k such that k and k^2 use only the digits 0, 5, 6 and 7.
Terms
- a(0) =0a(1) =76a(2) =760a(3) =7600a(4) =76000a(5) =760000a(6) =7600000a(7) =76000000a(8) =760000000a(9) =7600000000a(10) =76000000000a(11) =760000000000
External references
- oeis: A136962