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 | 0 |
| 2 | 70 |
| 3 | 2268 |
| 4 | 58036 |
| 5 | 1402082 |
| 6 | 33505396 |
| 7 | 804566180 |
| 8 | 19525545192 |
| 9 | 479803630966 |
| 10 | 11941873574498 |
| 11 | 300926010716524 |
| 12 | 7672376906432844 |
| 13 | 197762508822690802 |