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) |
|---|---|
| 3 | 0 |
| 4 | 173 |
| 5 | 2454 |
| 6 | 332147 |
| 7 | 37665879 |
| 8 | 774841151 |
| 9 | 1162263921 |
| 10 | 1937434592 |
| 11 | 2749609302 |
| 12 | 3486784574 |
| 13 | 3486786855 |
| 14 | 3487116548 |
| 15 | 3524450280 |