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 | 2 |
| 2 | 32 |
| 3 | 392 |
| 4 | 4352 |
| 5 | 46112 |
| 6 | 3584 |
| 7 | 4860032 |
| 8 | 49160192 |
| 9 | 494961152 |
| 10 | 451796992 |
| 11 | 49818601472 |
| 12 | 288555008 |
| 13 | 4993469652992 |
| 14 | 49960817917952 |
| 15 | 499764907507712 |
| 16 | 294034673238016 |
| 17 | 49991536670277632 |
| 18 | 3759016691892224 |
| 19 | 4999695320129994752 |
| 20 | 4545288356434542592 |
| 21 | 11627651895922786304 |