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 | 3 |
| 4 | 7 |
| 5 | 13 |
| 6 | 35 |
| 7 | 89 |
| 8 | 306 |
| 9 | 1141 |
| 10 | 5615 |
| 11 | 33397 |
| 12 | 260624 |
| 13 | 2623475 |
| 14 | 35100394 |
| 15 | 627244166 |
| 16 | 15122214205 |
| 17 | 493568138475 |