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 | 31 |
| 2 | 21 |
| 3 | 2555 |
| 4 | 2805 |
| 5 | 3315 |
| 6 | 17391 |
| 7 | 38893 |
| 8 | 104857575 |
| 9 | 59363 |
| 10 | 2097120 |
| 11 | 31713 |
| 12 | 376809 |
| 13 | 117440484 |
| 14 | 18790481885 |
| 15 | 197132241 |
| 16 | 2885681109 |
| 17 | 42991575 |
| 18 | 4966055899 |
| 19 | 13153337295 |
| 20 | 3959422917 |
| 21 | 120946279055305 |
| 22 | 4191888080835 |
| 23 | 3729543441416139 |
| 24 | 321057395310519 |
| 25 | 84662395338675 |
| 26 | 294669116243901 |