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 | 5 |
| 2 | 81 |
| 3 | 3429 |
| 4 | 238273 |
| 5 | 25669093 |
| 6 | 3923627345 |
| 7 | 807194393477 |
| 8 | 215176572950017 |
| 9 | 72120516857475141 |
| 10 | 29686285367774651089 |
| 11 | 14721686852776234894885 |
| 12 | 8656857857596485141973441 |
| 13 | 5955926696414663185424979749 |