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 | 41 |
| 2 | 193 |
| 3 | 6481 |
| 4 | 21523361 |
| 5 | 42521761 |
| 6 | 769 |
| 7 | 647753 |
| 8 | 926510094425921 |
| 9 | 282429005041 |
| 10 | 128653413121 |
| 11 | 56625998353 |
| 12 | 24127552321 |
| 13 | 37644053098601 |
| 14 | 36214795668330833 |
| 15 | 42521761 |
| 16 | 1716841910146256242328924544641 |
| 17 | 3833564416504313 |
| 18 | 56227703611393 |
| 19 | 278733912072436804273 |