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 | 1 |
| 2 | 4 |
| 3 | 24 |
| 4 | 256 |
| 5 | 5120 |
| 6 | 196608 |
| 7 | 14680064 |
| 8 | 2147483648 |
| 9 | 618475290624 |
| 10 | 351843720888320 |
| 11 | 396316767208603648 |
| 12 | 885443715538058477568 |
| 13 | 3929008913747544817795072 |
| 14 | 34662321099990647697175478272 |
| 15 | 608472288109550112718417538580480 |
| 16 | 21267647932558653966460912964485513216 |