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 | 4 |
| 4 | 7 |
| 5 | 13 |
| 6 | 46 |
| 7 | 88 |
| 8 | 209 |
| 9 | 473 |
| 10 | 1002 |
| 11 | 2120 |
| 12 | 5197 |
| 13 | 11085 |
| 14 | 25384 |
| 15 | 57234 |
| 16 | 126959 |
| 17 | 279883 |
| 18 | 640387 |
| 19 | 1412460 |
| 20 | 3182794 |
| 21 | 7138463 |
| 22 | 15963680 |
| 23 | 35593612 |
| 24 | 80143244 |
| 25 | 178644947 |
| 26 | 400681480 |
| 27 | 897313564 |
| 28 | 2008904252 |
| 29 | 4492651815 |
| 30 | 10074017008 |
| 31 | 22526314856 |
| 32 | 50459193392 |