A135474 A071605(n)/(n-1)!.
1, 3, 9, 36, 285, 1908, 21630, 197328, 2113911, 23814810, 294557142, 3893052636, 55457566905
Offset: 1
Extensions
a(10)-a(13) from Stephen A. Silver, Feb 21 2013
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.