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 | 8 |
| 3 | 17 |
| 4 | 127 |
| 5 | 144 |
| 6 | 4735 |
| 7 | 4879 |
| 8 | 38888 |
| 9 | 82655 |
| 10 | 617473 |
| 11 | 700128 |
| 12 | 23021569 |
| 13 | 23721697 |
| 14 | 189073448 |
| 15 | 401868593 |
| 16 | 3002153599 |
| 17 | 3404022192 |
| 18 | 111930863743 |
| 19 | 115334885935 |
| 20 | 919275065288 |
| 21 | 1953885016511 |
| 22 | 14596470180865 |
| 23 | 16550355197376 |
| 24 | 544207836496897 |
| 25 | 560758191694273 |