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 | 0 |
| 1 | 3 |
| 2 | 58 |
| 3 | 1045 |
| 4 | 18756 |
| 5 | 336567 |
| 6 | 6039454 |
| 7 | 108373609 |
| 8 | 1944685512 |
| 9 | 34895965611 |
| 10 | 626182695490 |
| 11 | 11236392553213 |
| 12 | 201628883262348 |
| 13 | 3618083506169055 |
| 14 | 64923874227780646 |
| 15 | 1165011652593882577 |
| 16 | 20905285872462105744 |