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 | 2 |
| 2 | 9 |
| 3 | 69 |
| 4 | 769 |
| 5 | 11346 |
| 6 | 208914 |
| 7 | 4613976 |
| 8 | 118840164 |
| 9 | 3496297632 |
| 10 | 115638728395 |
| 11 | 4246267163601 |
| 12 | 171369282105510 |
| 13 | 7538270885559264 |
| 14 | 358926669220446804 |
| 15 | 18389706733665138450 |
| 16 | 1008742283718489346668 |
| 17 | 58981158542987625464424 |