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) |
|---|---|
| 1 | 16 |
| 2 | 616 |
| 3 | 28832 |
| 4 | 1556780 |
| 5 | 93017264 |
| 6 | 5971377672 |
| 7 | 403667945712 |
| 8 | 28346017000314 |
| 9 | 2048467088599520 |
| 10 | 151362953286590792 |
| 11 | 11383212160213595696 |
| 12 | 868385902978402717696 |
| 13 | 67032303753464250574432 |
| 14 | 5225869642113491897295040 |
| 15 | 410865063418648682500317120 |