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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 16 |
| 5 | 59 |
| 6 | 246 |
| 7 | 1103 |
| 8 | 5247 |
| 9 | 26059 |
| 10 | 133881 |
| 11 | 706799 |
| 12 | 3815311 |
| 13 | 20979619 |
| 14 | 117178725 |
| 15 | 663316190 |
| 16 | 3798697446 |
| 17 | 21976689397 |