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 | 1 |
| 2 | 5 |
| 3 | 37 |
| 4 | 766 |
| 5 | 43318 |
| 6 | 7695805 |
| 7 | 4015896016 |
| 8 | 6371333036059 |
| 9 | 30153126159555641 |
| 10 | 431453249608567040694 |
| 11 | 18558756256964594960321428 |
| 12 | 2411839397220672351872242339314 |
| 13 | 945878376319424018440202856702995909 |
| 14 | 1121914029089423867715407724741780046405923 |