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 | 7 |
| 2 | 133 |
| 3 | 5419 |
| 4 | 383785 |
| 5 | 41782831 |
| 6 | 6472067437 |
| 7 | 1352114646163 |
| 8 | 366325440650449 |
| 9 | 124893891684358615 |
| 10 | 52323557348796456661 |
| 11 | 26420766706149889279867 |
| 12 | 15824833185409769038803193 |
| 13 | 11092546337733020334329204479 |
| 14 | 8995627147680234199615065312445 |