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 | 8 |
| 3 | 99 |
| 4 | 1684 |
| 5 | 36865 |
| 6 | 994986 |
| 7 | 32106655 |
| 8 | 1209994808 |
| 9 | 52281293697 |
| 10 | 2551380861070 |
| 11 | 138903509144191 |
| 12 | 8350198884092484 |
| 13 | 549502839975044449 |
| 14 | 39295464010757324930 |
| 15 | 3034457861009541582015 |
| 16 | 251666093876245502584816 |
| 17 | 22310882229970705663827457 |