A122244 Iterates of A122237, starting from 5.
5, 21, 55, 183, 512, 1724, 6085, 20899, 66106, 231841, 888275, 3188220
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.