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 | 56 |
| 2 | 5209 |
| 3 | 189595 |
| 4 | 5355983 |
| 5 | 141166787 |
| 6 | 3634987413 |
| 7 | 90752836672 |
| 8 | 2155380363189 |
| 9 | 48042054699217 |
| 10 | 999491681597761 |
| 11 | 19416161058987737 |
| 12 | 353517442918850559 |
| 13 | 6065787121333416262 |
| 14 | 98680235108923294584 |
| 15 | 1531317900358396738494 |