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 | 7 |
| 4 | 12 |
| 5 | 41 |
| 6 | 100 |
| 7 | 521 |
| 8 | 1150 |
| 9 | 10391 |
| 10 | 15008 |
| 11 | 255247 |
| 12 | 1786778 |
| 13 | 4849835 |
| 14 | 5870858 |
| 15 | 6561553 |
| 16 | 557732162 |
| 17 | 3234846601 |
| 18 | 3457939474 |
| 19 | 4360010651 |