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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 12 |
| 5 | 25 |
| 6 | 172 |
| 7 | 482 |
| 8 | 5318 |
| 9 | 19675 |
| 10 | 333768 |
| 11 | 1609846 |
| 12 | 40832554 |
| 13 | 254370640 |
| 14 | 9459449890 |
| 15 | 75546875426 |
| 16 | 4061670272088 |