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 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 32 |
| 6 | 68 |
| 7 | 148 |
| 8 | 342 |
| 9 | 848 |
| 10 | 2297 |
| 11 | 6928 |
| 12 | 24034 |
| 13 | 98854 |
| 14 | 503137 |
| 15 | 3318732 |
| 16 | 29708814 |
| 17 | 374039266 |
| 18 | 6739630253 |
| 19 | 173801649708 |
| 20 | 6356255181216 |
| 21 | 326203517516704 |
| 22 | 23294352980140884 |
| 23 | 2301176047764925736 |
| 24 | 313285408199180770635 |
| 25 | 58638266023262502962716 |