A045886 Erroneous version of A003462.
1, 4, 13, 121, 364, 1093, 3280, 9841, 29524, 88573, 265720, 797161, 2391484, 7174453
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.