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 | 6 |
| 4 | 18 |
| 5 | 36 |
| 6 | 108 |
| 7 | 216 |
| 8 | 648 |
| 9 | 1296 |
| 10 | 3888 |
| 11 | 7776 |
| 12 | 23328 |
| 13 | 46656 |
| 14 | 139968 |
| 15 | 279936 |
| 16 | 839808 |
| 17 | 1679616 |
| 18 | 5038848 |
| 19 | 10077696 |
| 20 | 30233088 |
| 21 | 60466176 |
| 22 | 181398528 |
| 23 | 362797056 |
| 24 | 1088391168 |
| 25 | 2176782336 |
| 26 | 6530347008 |
| 27 | 13060694016 |
| 28 | 39182082048 |
| 29 | 78364164096 |
| 30 | 235092492288 |
| 31 | 470184984576 |