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 | 48 |
| 2 | 2256 |
| 3 | 106032 |
| 4 | 4983504 |
| 5 | 234224688 |
| 6 | 11008560336 |
| 7 | 517402335792 |
| 8 | 24317909782224 |
| 9 | 1142941759764528 |
| 10 | 53718262708932816 |
| 11 | 2524758347319842352 |
| 12 | 118663642324032590544 |
| 13 | 5577191189229531755568 |
| 14 | 262127985893787992511696 |