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 | 2 |
| 4 | 6 |
| 5 | 10 |
| 6 | 84 |
| 7 | 70 |
| 8 | 24 |
| 9 | 36 |
| 10 | 330 |
| 11 | 210 |
| 12 | 288 |
| 13 | 1428 |
| 14 | 252 |
| 15 | 10080 |
| 16 | 13680 |
| 17 | 1260 |
| 18 | 19320 |
| 19 | 2160 |
| 20 | 22440 |
| 21 | 1692152 |
| 22 | 50400 |
| 23 | 140760 |
| 24 | 3071880 |
| 25 | 284088 |
| 26 | 608753236 |
| 27 | 617760 |
| 28 | 15600 |
| 29 | 35287560 |
| 30 | 214138080 |
| 31 | 30240 |
| 32 | 1866600 |
| 33 | 58333800 |
| 34 | 8637552 |
| 35 | 4034916600 |