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 | 1 |
| 1 | 1 |
| 2 | 233 |
| 3 | 2131 |
| 4 | 145601 |
| 5 | 2332097 |
| 6 | 106912793 |
| 7 | 2188978117 |
| 8 | 82741005829 |
| 9 | 1937528668711 |
| 10 | 65743732590821 |
| 11 | 1666961188795475 |
| 12 | 53060477521960000 |
| 13 | 1412218550274852671 |
| 14 | 43242613716069407953 |
| 15 | 1185802123987680144427 |
| 16 | 35457442115448212075033 |
| 17 | 990424779934371836605849 |