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 | 16 |
| 2 | 264 |
| 3 | 4912 |
| 4 | 104476 |
| 5 | 2531004 |
| 6 | 69265724 |
| 7 | 2122120824 |
| 8 | 72160283026 |
| 9 | 2702008172582 |
| 10 | 110631977612048 |
| 11 | 4922281897250776 |
| 12 | 236665779016591350 |
| 13 | 12236187035970192634 |
| 14 | 677311496213007409312 |
| 15 | 39980910968200568816168 |