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 | 0 |
| 2 | 9 |
| 3 | 160 |
| 4 | 5465 |
| 5 | 287216 |
| 6 | 21643273 |
| 7 | 2214984576 |
| 8 | 295720862649 |
| 9 | 49933547619472 |
| 10 | 10404630591819497 |
| 11 | 2622531836368780832 |
| 12 | 786513638108085303193 |
| 13 | 276793205620647080017968 |
| 14 | 112961387008976003691598281 |
| 15 | 52917386659933341334644891328 |
| 16 | 28203267311410367019573922744697 |