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 | 1393 |
| 3 | 28642 |
| 4 | 231521 |
| 5 | 1168786 |
| 6 | 4414417 |
| 7 | 13667858 |
| 8 | 36590017 |
| 9 | 87627106 |
| 10 | 192124721 |
| 11 | 392074882 |
| 12 | 753879073 |
| 13 | 1378550642 |
| 14 | 2414820241 |
| 15 | 4075648306 |
| 16 | 6658688897 |
| 17 | 10571289538 |
| 18 | 16360652017 |
| 19 | 24749819426 |
| 20 | 36680195041 |
| 21 | 53361338962 |