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 | 2 |
| 1 | 7 |
| 2 | 19 |
| 3 | 109 |
| 4 | 163 |
| 5 | 487 |
| 6 | 1459 |
| 7 | 17497 |
| 8 | 52489 |
| 9 | 39367 |
| 10 | 472393 |
| 11 | 4960117 |
| 12 | 5314411 |
| 13 | 102036673 |
| 14 | 19131877 |
| 15 | 57395629 |
| 16 | 86093443 |
| 17 | 258280327 |
| 18 | 3874204891 |
| 19 | 23245229341 |
| 20 | 90656394427 |
| 21 | 585779779369 |
| 22 | 251048476873 |
| 23 | 9790890598009 |
| 24 | 4518872583697 |