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 | 3 |
| 3 | 7 |
| 4 | 12 |
| 5 | 84 |
| 6 | 144 |
| 7 | 728 |
| 8 | 6096 |
| 9 | 8736 |
| 10 | 19812 |
| 11 | 85120 |
| 12 | 163520 |
| 13 | 738720 |
| 14 | 871416 |
| 15 | 2419200 |
| 16 | 2935296 |
| 17 | 7567168 |
| 18 | 15193920 |
| 19 | 84319872 |
| 20 | 169303680 |
| 21 | 259445760 |
| 22 | 934545248 |
| 23 | 8600626944 |
| 24 | 9438363648 |
| 25 | 19853729280 |
| 26 | 34805721600 |
| 27 | 87037870374 |
| 28 | 165451302016 |
| 29 | 254879514624 |
| 30 | 957538713600 |