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 | 1 |
| 2 | 9 |
| 3 | 55 |
| 4 | 3931 |
| 5 | 250161 |
| 6 | 21167471 |
| 7 | 161868896 |
| 8 | 14483006487 |
| 9 | 11964222750137 |
| 10 | 9488866319074179 |
| 11 | 8876681395262941651 |
| 12 | 743721954738246462653 |
| 13 | 67116371525158827117467 |
| 14 | 6399467982631423050735227 |