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 | 1 |
| 2 | 3 |
| 3 | 21 |
| 4 | 903 |
| 5 | 2667 |
| 6 | 7077 |
| 7 | 113799 |
| 8 | 114681 |
| 9 | 304311 |
| 10 | 389193 |
| 11 | 898779 |
| 12 | 932799 |
| 13 | 4893357 |
| 14 | 6099429 |
| 15 | 8131683 |
| 16 | 8776257 |
| 17 | 14452473 |
| 18 | 38350263 |
| 19 | 38647497 |
| 20 | 40647747 |
| 21 | 49427511 |
| 22 | 99583113 |
| 23 | 118465473 |
| 24 | 128794323 |
| 25 | 131158041 |
| 26 | 152643813 |
| 27 | 262275447 |
| 28 | 300510651 |
| 29 | 314353263 |
| 30 | 335873559 |
| 31 | 349662369 |