Numbers k such that k^2 contains only digits {6,7,9}.
A053972
Numbers k such that k^2 contains only digits {6,7,9}.
Terms
- a(0) =3a(1) =26a(2) =264a(3) =313a(4) =3114a(5) =3114113a(6) =278922387a(7) =881361264a(8) =2603208937a(9) =3125343176a(10) =312518799063
External references
- oeis: A053972