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 | 4 |
| 4 | 1 |
| 5 | 20 |
| 6 | 32 |
| 7 | 1 |
| 8 | 86 |
| 9 | 420 |
| 10 | 400 |
| 11 | 1 |
| 12 | 370 |
| 13 | 4164 |
| 14 | 10368 |
| 15 | 6912 |
| 16 | 1 |
| 17 | 1626 |
| 18 | 38205 |
| 19 | 186552 |
| 20 | 301840 |
| 21 | 153664 |
| 22 | 1 |
| 23 | 7310 |
| 24 | 343380 |
| 25 | 2934560 |
| 26 | 8637760 |
| 27 | 10223616 |
| 28 | 4194304 |
| 29 | 1 |
| 30 | 33464 |
| 31 | 3086049 |
| 32 | 43517697 |
| 33 | 207353960 |
| 34 | 427708848 |
| 35 | 396809280 |
| 36 | 136048896 |