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 | 5 |
| 4 | 12 |
| 5 | 17 |
| 6 | 63 |
| 7 | 143 |
| 8 | 492 |
| 9 | 635 |
| 10 | 2397 |
| 11 | 3032 |
| 12 | 93357 |
| 13 | 96389 |
| 14 | 478913 |
| 15 | 575302 |
| 16 | 1629517 |
| 17 | 15240955 |
| 18 | 93075247 |
| 19 | 387541943 |
| 20 | 480617190 |
| 21 | 868159133 |
| 22 | 2216935456 |
| 23 | 16386707325 |
| 24 | 34990350106 |
| 25 | 121357757643 |
| 26 | 277705865392 |
| 27 | 399063623035 |
| 28 | 2672087603602 |
| 29 | 3071151226637 |