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 | 23 |
| 2 | 322 |
| 3 | 3427 |
| 4 | 30429 |
| 5 | 236371 |
| 6 | 1654137 |
| 7 | 10633291 |
| 8 | 63665679 |
| 9 | 358718373 |
| 10 | 1917142690 |
| 11 | 9779753341 |
| 12 | 47860052964 |
| 13 | 225631690224 |
| 14 | 1028303816386 |
| 15 | 4543788611823 |
| 16 | 19515830222431 |
| 17 | 81653870900161 |
| 18 | 333437792190697 |