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) |
|---|---|
| 2 | 0 |
| 3 | 1 |
| 4 | 1640 |
| 5 | 123744 |
| 6 | 1546356 |
| 7 | 9282128 |
| 8 | 37896264 |
| 9 | 121782952 |
| 10 | 331901924 |
| 11 | 801191922 |
| 12 | 1761200680 |
| 13 | 3592793804 |
| 14 | 6894127812 |
| 15 | 12569395174 |