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 | 5 |
| 2 | 6 |
| 3 | 12 |
| 4 | 28 |
| 5 | 56 |
| 6 | 120 |
| 7 | 360 |
| 8 | 1170 |
| 9 | 3276 |
| 10 | 10192 |
| 11 | 24738 |
| 12 | 61440 |
| 13 | 196584 |
| 14 | 491520 |
| 15 | 1572840 |
| 16 | 5433480 |
| 17 | 20180160 |
| 18 | 94859856 |
| 19 | 355532800 |
| 20 | 1040179456 |
| 21 | 2143289344 |
| 22 | 4966055344 |
| 23 | 10092086208 |
| 24 | 31800637440 |
| 25 | 137371852800 |
| 26 | 641012414823 |