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 | 2 |
| 1 | 5 |
| 2 | 41 |
| 3 | 73 |
| 4 | 193 |
| 5 | 1181 |
| 6 | 6481 |
| 7 | 16493 |
| 8 | 21523361 |
| 9 | 530713 |
| 10 | 42521761 |
| 11 | 570461 |
| 12 | 769 |
| 13 | 4795973261 |
| 14 | 647753 |
| 15 | 47763361 |
| 16 | 926510094425921 |
| 17 | 1743831169 |
| 18 | 282429005041 |
| 19 | 25480398173 |
| 20 | 128653413121 |
| 21 | 109688713 |
| 22 | 56625998353 |
| 23 | 70601370627701 |