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) |
|---|---|
| 1 | 3 |
| 2 | 36 |
| 3 | 624 |
| 4 | 9540 |
| 5 | 170868 |
| 6 | 3171708 |
| 7 | 59683122 |
| 8 | 1152091884 |
| 9 | 22554305502 |
| 10 | 446374660920 |
| 11 | 8921216076156 |
| 12 | 179685599410440 |
| 13 | 3642895093030506 |
| 14 | 74273800555695024 |
| 15 | 1521731710882139544 |
| 16 | 31310362607335978500 |