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 | 1 |
| 2 | 21 |
| 3 | 671 |
| 4 | 180323 |
| 5 | 20898423 |
| 6 | 7426362705 |
| 7 | 1874409467055 |
| 8 | 5099063967524835 |
| 9 | 2246777786836681835 |
| 10 | 2490122296790918386363 |
| 11 | 1694873049836486741425113 |
| 12 | 5559749161756484280905626951 |
| 13 | 5406810236613380495234085140851 |
| 14 | 12304442295910538475633061651918089 |