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 | 21 |
| 2 | 714 |
| 3 | 19635 |
| 4 | 582505 |
| 5 | 16776144 |
| 6 | 488605194 |
| 7 | 14169550626 |
| 8 | 411591708660 |
| 9 | 11948265189630 |
| 10 | 346934172869802 |
| 11 | 10072785423545712 |
| 12 | 292460526776698763 |
| 13 | 8491396839675395415 |
| 14 | 246543315138161480670 |
| 15 | 7158243695757340957617 |
| 16 | 207835653079349665473587 |