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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 11 |
| 4 | 13 |
| 5 | 76 |
| 6 | 89 |
| 7 | 165 |
| 8 | 3059 |
| 9 | 3224 |
| 10 | 6283 |
| 11 | 34639 |
| 12 | 40922 |
| 13 | 239249 |
| 14 | 280171 |
| 15 | 519420 |
| 16 | 9629731 |
| 17 | 10149151 |
| 18 | 19778882 |
| 19 | 109043561 |
| 20 | 128822443 |
| 21 | 753155776 |
| 22 | 881978219 |
| 23 | 1635133995 |
| 24 | 30314390129 |
| 25 | 31949524124 |
| 26 | 62263914253 |
| 27 | 343269095389 |
| 28 | 405533009642 |
| 29 | 2370934143599 |