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 | 1404 |
| 2 | 280854 |
| 3 | 19014840 |
| 4 | 581257404 |
| 5 | 9436118328 |
| 6 | 93086496360 |
| 7 | 638406025200 |
| 8 | 3387901252374 |
| 9 | 14765641285044 |
| 10 | 55108831380408 |
| 11 | 181434042582840 |
| 12 | 538265644820280 |
| 13 | 1464212332875816 |
| 14 | 3696677780664960 |
| 15 | 8759016189382896 |
| 16 | 19620550996489404 |
| 17 | 41872709357187696 |