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 | 20 |
| 2 | 1182 |
| 3 | 99880 |
| 4 | 9587580 |
| 5 | 981706832 |
| 6 | 104715443852 |
| 7 | 11488774559744 |
| 8 | 1286742755471400 |
| 9 | 146402730743793240 |
| 10 | 16865594582168158776 |
| 11 | 1962541914958813595480 |
| 12 | 230271584688553159320640 |
| 13 | 27207473390887478569212080 |
| 14 | 3233802551602631768613571584 |