A058471 Numbers k such that k^2 contains only digits {7,8,9}.
3, 9949370777987917
Offset: 1
Links
- P. De Geest, Index to related sequences
- Hisanori Mishima, Sporadic tridigital solutions
Crossrefs
Cf. A058472.
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.