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 | 43 |
| 3 | 416 |
| 4 | 4239 |
| 5 | 44485 |
| 6 | 475780 |
| 7 | 5156548 |
| 8 | 56437231 |
| 9 | 622361423 |
| 10 | 6904185523 |
| 11 | 76964141600 |
| 12 | 861408728964 |
| 13 | 9673849095708 |
| 14 | 108954068684616 |
| 15 | 1230185577016156 |
| 16 | 13920106205444335 |
| 17 | 157814104889538739 |