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 | 3 |
| 2 | 7 |
| 3 | 17 |
| 4 | 21 |
| 5 | 47 |
| 6 | 329 |
| 7 | 987 |
| 8 | 2207 |
| 9 | 5777 |
| 10 | 15005 |
| 11 | 98209 |
| 12 | 103729 |
| 13 | 726103 |
| 14 | 2178309 |
| 15 | 4870847 |
| 16 | 598364773 |
| 17 | 10749959329 |
| 18 | 192900153617 |
| 19 | 505248088463 |
| 20 | 3536736619241 |
| 21 | 10610209857723 |
| 22 | 23725150497407 |
| 23 | 1114384187445409 |
| 24 | 18944531186571953 |