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 | 2 |
| 2 | 4098 |
| 3 | 1062884 |
| 4 | 2210336770 |
| 5 | 2000488281252 |
| 6 | 4355497029345924 |
| 7 | 6773152698818628936 |
| 8 | 15744083665278445490178 |
| 9 | 32270900877696351763796420 |
| 10 | 80314784333143089874093429348 |
| 11 | 192454957455454582636391397662856 |
| 12 | 509571049488109525160616367158261124 |