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 | 7 |
| 3 | 61 |
| 4 | 595 |
| 5 | 6217 |
| 6 | 68047 |
| 7 | 770149 |
| 8 | 8939707 |
| 9 | 105843409 |
| 10 | 1273241431 |
| 11 | 15517824973 |
| 12 | 191202877411 |
| 13 | 2377843390873 |
| 14 | 29807864423071 |
| 15 | 376255282112629 |
| 16 | 4778240359795147 |
| 17 | 61007205215610529 |
| 18 | 782648075371992487 |
| 19 | 10083436451634033757 |
| 20 | 130413832663780730995 |
| 21 | 1692599303723819234281 |
| 22 | 22037570163808433691247 |
| 23 | 287762084009227350367621 |