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 | 1 |
| 3 | 8 |
| 4 | 93 |
| 5 | 1354 |
| 6 | 23900 |
| 7 | 496244 |
| 8 | 11855700 |
| 9 | 320428318 |
| 10 | 9667220397 |
| 11 | 322072882348 |
| 12 | 11744421711587 |
| 13 | 465270864839688 |
| 14 | 19899234175413257 |
| 15 | 913836170567749048 |
| 16 | 44849438199960187278 |
| 17 | 2342666125012348876152 |