A099086 A bisection of A006966.
1, 1, 5, 53, 1078, 37622, 2018305, 152233518, 15150569446
Offset: 0
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.