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 | 54 |
| 2 | 90 |
| 3 | 126 |
| 4 | 162 |
| 5 | 198 |
| 6 | 378 |
| 7 | 4950 |
| 8 | 12978 |
| 9 | 82278 |
| 10 | 94218606 |
| 11 | 8855754260391450 |
| 12 | 645856907610421353834 |
| 13 | 1350253136232108126126 |
| 14 | 27709820863862780667438 |