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 | 2 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 5 |
| 6 | 1 |
| 7 | 103 |
| 8 | 13 |
| 9 | 249 |
| 10 | 19 |
| 11 | 329891 |
| 12 | 32 |
| 13 | 36846277 |
| 14 | 1379 |
| 15 | 59793 |
| 16 | 126689 |
| 17 | 1230752346353 |
| 18 | 4727 |
| 19 | 336967037143579 |
| 20 | 436486 |
| 21 | 2252263619 |
| 22 | 56815333 |
| 23 | 48869596859895986087 |
| 24 | 1549256 |
| 25 | 1654529071288638505 |
| 26 | 23390099351 |
| 27 | 56463097772562963 |
| 28 | 51860555558 |
| 29 | 10513391193507374500051862069 |