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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 8 |
| 7 | 8 |
| 8 | 32 |
| 9 | 96 |
| 10 | 576 |
| 11 | 576 |
| 12 | 4608 |
| 13 | 4608 |
| 14 | 36864 |
| 15 | 258048 |
| 16 | 2064384 |
| 17 | 2064384 |
| 18 | 24772608 |
| 19 | 24772608 |
| 20 | 297271296 |
| 21 | 2675441664 |
| 22 | 32105299968 |
| 23 | 32105299968 |
| 24 | 513684799488 |
| 25 | 2568423997440 |
| 26 | 35957935964160 |
| 27 | 323621423677440 |
| 28 | 5177942778839040 |
| 29 | 5177942778839040 |