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 | 3 |
| 2 | 6 |
| 3 | 14 |
| 4 | 37 |
| 5 | 107 |
| 6 | 329 |
| 7 | 1055 |
| 8 | 3486 |
| 9 | 11780 |
| 10 | 40510 |
| 11 | 141286 |
| 12 | 498524 |
| 13 | 1776312 |
| 14 | 6382292 |
| 15 | 23097542 |
| 16 | 84118037 |
| 17 | 308049947 |
| 18 | 1133682557 |
| 19 | 4190570237 |
| 20 | 15551547887 |
| 21 | 57919961507 |
| 22 | 216418821767 |
| 23 | 811055485427 |
| 24 | 3047804166425 |
| 25 | 11481792822005 |