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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 12 |
| 4 | 32 |
| 5 | 60 |
| 6 | 216 |
| 7 | 252 |
| 8 | 912 |
| 9 | 1494 |
| 10 | 3960 |
| 11 | 4092 |
| 12 | 23904 |
| 13 | 16380 |
| 14 | 65016 |
| 15 | 130920 |
| 16 | 324960 |
| 17 | 262140 |
| 18 | 1569132 |
| 19 | 1048572 |
| 20 | 6281280 |
| 21 | 8388072 |
| 22 | 16769016 |
| 23 | 16777212 |
| 24 | 134150880 |
| 25 | 100663050 |
| 26 | 268402680 |
| 27 | 536865840 |
| 28 | 1610449344 |
| 29 | 1073741820 |
| 30 | 8589664080 |
| 31 | 4294967292 |
| 32 | 25768888320 |