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 | 8 |
| 4 | 122 |
| 5 | 212 |
| 6 | 6932 |
| 7 | 450452 |
| 8 | 9189182 |
| 9 | 193993802 |
| 10 | 2677114442 |
| 11 | 116454478142 |
| 12 | 5415133233512 |
| 13 | 51945166943672 |
| 14 | 1521251317636052 |
| 15 | 562558737261811292 |
| 16 | 1229779565176982822 |
| 17 | 130356633908760178922 |
| 18 | 19227603501542126390702 |
| 19 | 4456958491657464897364262 |