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 | 105 |
| 3 | 7857 |
| 4 | 555195 |
| 5 | 38757695 |
| 6 | 2698167665 |
| 7 | 187715481077 |
| 8 | 13057666054455 |
| 9 | 908271228919067 |
| 10 | 63177423571626685 |
| 11 | 4394479113198329137 |
| 12 | 305669914361091938915 |
| 13 | 21261697652022553831895 |
| 14 | 1478914849135091196256585 |
| 15 | 102869919107895518546358701 |