Numbers k such that k^2 contains only digits {1,6,7}.
A053906
Numbers k such that k^2 contains only digits {1,6,7}.
Terms
- a(0) =1a(1) =4a(2) =26a(3) =131a(4) =276a(5) =881a(6) =3431a(7) =81346a(8) =81619a(9) =129119a(10) =132954a(11) =1292931424
External references
- oeis: A053906