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 | 9 |
| 3 | 28 |
| 4 | 72 |
| 5 | 126 |
| 6 | 252 |
| 7 | 344 |
| 8 | 576 |
| 9 | 756 |
| 10 | 1134 |
| 11 | 1332 |
| 12 | 2016 |
| 13 | 2198 |
| 14 | 3096 |
| 15 | 3528 |
| 16 | 4608 |
| 17 | 4914 |
| 18 | 6804 |
| 19 | 6860 |
| 20 | 9072 |
| 21 | 9632 |
| 22 | 11988 |
| 23 | 12168 |
| 24 | 16128 |
| 25 | 15750 |
| 26 | 19782 |
| 27 | 20412 |
| 28 | 24768 |
| 29 | 24390 |
| 30 | 31752 |
| 31 | 29792 |
| 32 | 36864 |
| 33 | 37296 |
| 34 | 44226 |
| 35 | 43344 |
| 36 | 54432 |
| 37 | 50654 |
| 38 | 61740 |
| 39 | 61544 |