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 | 0 |
| 3 | 2 |
| 4 | 6 |
| 5 | 8 |
| 6 | 10 |
| 7 | 162 |
| 8 | 420 |
| 9 | 174 |
| 10 | 486 |
| 11 | 974 |
| 12 | 4486 |
| 13 | 1794 |
| 14 | 20834 |
| 15 | 26986 |
| 16 | 16098 |
| 17 | 19220 |
| 18 | 19738 |
| 19 | 58362 |
| 20 | 60918 |
| 21 | 48564 |
| 22 | 87476 |
| 23 | 38602 |
| 24 | 579030 |
| 25 | 231612 |
| 26 | 587034 |
| 27 | 1375080 |
| 28 | 6356154 |
| 29 | 951846 |
| 30 | 1038240 |
| 31 | 205702 |
| 32 | 2409400 |
| 33 | 4039834 |