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 | 30 |
| 1 | 30 |
| 2 | 140 |
| 3 | 105 |
| 4 | 1 |
| 5 | 140 |
| 6 | 3960 |
| 7 | 495 |
| 8 | 1430 |
| 9 | 6006 |
| 10 | 5460 |
| 11 | 130 |
| 12 | 7140 |
| 13 | 2040 |
| 14 | 5168 |
| 15 | 14535 |
| 16 | 11970 |
| 17 | 14630 |
| 18 | 15180 |
| 19 | 5313 |
| 20 | 6325 |
| 21 | 89700 |
| 22 | 23400 |
| 23 | 6825 |
| 24 | 142506 |
| 25 | 7830 |
| 26 | 125860 |
| 27 | 53940 |
| 28 | 40920 |
| 29 | 92752 |
| 30 | 628320 |
| 31 | 6545 |
| 32 | 6290 |
| 33 | 442890 |
| 34 | 329004 |
| 35 | 45695 |
| 36 | 151905 |
| 37 | 223860 |
| 38 | 493640 |