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 | 3 |
| 2 | 9 |
| 3 | 28 |
| 4 | 93 |
| 5 | 338 |
| 6 | 1369 |
| 7 | 6238 |
| 8 | 31993 |
| 9 | 183618 |
| 10 | 1169229 |
| 11 | 8187598 |
| 12 | 62545893 |
| 13 | 517622498 |
| 14 | 4613366689 |
| 15 | 44054301358 |
| 16 | 448733127793 |
| 17 | 4856429646978 |
| 18 | 55650582121749 |
| 19 | 673136951045518 |
| 20 | 8570645832753693 |
| 21 | 114581094529057058 |
| 22 | 1604780986816602409 |
| 23 | 23497612049668468078 |