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 | 12 |
| 3 | 165 |
| 4 | 2296 |
| 5 | 31977 |
| 6 | 445380 |
| 7 | 6203341 |
| 8 | 86401392 |
| 9 | 1203416145 |
| 10 | 16761424636 |
| 11 | 233456528757 |
| 12 | 3251629977960 |
| 13 | 45289363162681 |
| 14 | 630799454299572 |
| 15 | 8785902997031325 |
| 16 | 122371842504138976 |
| 17 | 1704419892060914337 |