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 | 3 |
| 2 | 43 |
| 3 | 1211 |
| 4 | 54812 |
| 5 | 3572775 |
| 6 | 313493737 |
| 7 | 35368945463 |
| 8 | 4962511954307 |
| 9 | 844198388785291 |
| 10 | 170675800745636572 |
| 11 | 40352181663578992883 |
| 12 | 11008690527354504977193 |
| 13 | 3426969405868832970281647 |
| 14 | 1205708016597226199323015459 |
| 15 | 475502109963529414669658708847 |