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 | 8 |
| 2 | 120 |
| 3 | 2556 |
| 4 | 71548 |
| 5 | 2508528 |
| 6 | 106427700 |
| 7 | 5323786728 |
| 8 | 307710142888 |
| 9 | 20222341451124 |
| 10 | 1491479257952300 |
| 11 | 122128352186849366 |
| 12 | 11002901720698439826 |
| 13 | 1082337197005046142588 |
| 14 | 115485905212456384697750 |