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 | 730 |
| 3 | 47386 |
| 4 | 1047386 |
| 5 | 12438011 |
| 6 | 98204132 |
| 7 | 580094436 |
| 8 | 2756876772 |
| 9 | 11060642397 |
| 10 | 38741283022 |
| 11 | 121395233038 |
| 12 | 346594833742 |
| 13 | 914464085783 |
| 14 | 2254559726408 |
| 15 | 5240543726408 |
| 16 | 11568062614344 |
| 17 | 24395756421273 |
| 18 | 49397866465794 |
| 19 | 96443747465794 |
| 20 | 182209868465794 |