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 | 9 |
| 5 | 14 |
| 6 | 161 |
| 7 | 261 |
| 8 | 5727 |
| 9 | 12127 |
| 10 | 16394 |
| 11 | 20029238 |
| 12 | 577738261 |
| 13 | 2637324098 |
| 14 | 45019843643 |
| 15 | 54756012358 |
| 16 | 142046769201 |
| 17 | 2144325306742 |
| 18 | 2247950127743 |
| 19 | 34462584090334 |
| 20 | 223385072880447 |