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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 521 |
| 4 | 9299 |
| 5 | 350368 |
| 6 | 8398593 |
| 7 | 222485869 |
| 8 | 5541334459 |
| 9 | 140076298669 |
| 10 | 3556982106479 |
| 11 | 91815282711883 |
| 12 | 2417687110590928 |
| 13 | 65153661912489687 |
| 14 | 1799667133155589009 |