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 | 10 |
| 4 | 89 |
| 5 | 1002 |
| 6 | 12592 |
| 7 | 168805 |
| 8 | 2363241 |
| 9 | 34138860 |
| 10 | 505042286 |
| 11 | 7612594936 |
| 12 | 116492572621 |
| 13 | 1804984878387 |
| 14 | 28260999959595 |
| 15 | 446441276449715 |
| 16 | 7106718529937710 |
| 17 | 113886198966545724 |