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.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 10 |
| 3 | 73 |
| 4 | 574 |
| 5 | 4543 |
| 6 | 37723 |
| 7 | 320991 |
| 8 | 2796946 |
| 9 | 24758534 |
| 10 | 222126290 |
| 11 | 2014200162 |
| 12 | 18425778658 |