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 | 3 |
| 3 | 7 |
| 4 | 18 |
| 5 | 43 |
| 6 | 102 |
| 7 | 241 |
| 8 | 563 |
| 9 | 1293 |
| 10 | 2960 |
| 11 | 6722 |
| 12 | 15140 |
| 13 | 33919 |
| 14 | 75576 |
| 15 | 167490 |
| 16 | 369556 |
| 17 | 811953 |
| 18 | 1776993 |
| 19 | 3875220 |
| 20 | 8423004 |
| 21 | 18251468 |
| 22 | 39435686 |
| 23 | 84980633 |
| 24 | 182669118 |
| 25 | 391736024 |
| 26 | 838237802 |
| 27 | 1789955529 |
| 28 | 3814790598 |
| 29 | 8115210879 |