A122234 Iterates of A122227, starting from A122227(5)=18.
5, 18, 62, 180, 620, 1836, 5997, 23675, 76849, 263613, 923897, 3090855
Offset: 1
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.