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 | 0 |
| 2 | 1 |
| 3 | 190 |
| 4 | 29761 |
| 5 | 9991618 |
| 6 | 3349024561 |
| 7 | 1787557230622 |
| 8 | 1073002497284641 |
| 9 | 913569251212186570 |
| 10 | 1211439486817121619201 |
| 11 | 1701996355944048723430570 |
| 12 | 3350440495714062711027347281 |
| 13 | 7769260076569386601943106748798 |
| 14 | 18992268581018658446853739996365841 |
| 15 | 54445901270324824915088660223022735282 |