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 | 5 |
| 2 | 36 |
| 3 | 328 |
| 4 | 3440 |
| 5 | 39408 |
| 6 | 478912 |
| 7 | 6068480 |
| 8 | 79315200 |
| 9 | 1061628160 |
| 10 | 14480086016 |
| 11 | 200540018688 |
| 12 | 2812618092544 |
| 13 | 39867889037312 |
| 14 | 570237130752000 |
| 15 | 8219880968028160 |
| 16 | 119293333282291712 |
| 17 | 1741605394647416832 |