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 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 56 |
| 5 | 188 |
| 6 | 639 |
| 7 | 2206 |
| 8 | 8485 |
| 9 | 31278 |
| 10 | 114960 |
| 11 | 423612 |
| 12 | 1621969 |
| 13 | 6160764 |
| 14 | 23359289 |
| 15 | 88603820 |
| 16 | 341015446 |
| 17 | 1312635338 |
| 18 | 5052259362 |
| 19 | 19452272144 |
| 20 | 75341562629 |
| 21 | 292245458188 |
| 22 | 1134351244952 |
| 23 | 4405229026674 |
| 24 | 17153557736343 |