A048826 a(n) = least k such that A048825(k) = n.
2, 3, 5, 19, 1093, 12721, 4062241
Offset: 0
Crossrefs
Cf. A048827.
Extensions
a(6) from Max Alekseyev, Jun 13 2011
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.