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 | 2 |
| 1 | 30 |
| 2 | 3 |
| 3 | 560 |
| 4 | 20 |
| 5 | 20 |
| 6 | 11550 |
| 7 | 210 |
| 8 | 75 |
| 9 | 210 |
| 10 | 252252 |
| 11 | 2772 |
| 12 | 504 |
| 13 | 504 |
| 14 | 2772 |
| 15 | 5717712 |
| 16 | 42042 |
| 17 | 4620 |
| 18 | 2352 |
| 19 | 4620 |
| 20 | 42042 |
| 21 | 133024320 |
| 22 | 700128 |
| 23 | 51480 |
| 24 | 15840 |
| 25 | 15840 |
| 26 | 51480 |
| 27 | 700128 |
| 28 | 3155170590 |
| 29 | 12471030 |
| 30 | 656370 |
| 31 | 135135 |
| 32 | 81675 |
| 33 | 135135 |
| 34 | 656370 |
| 35 | 12471030 |
| 36 | 75957810500 |
| 37 | 233716340 |
| 38 | 9237800 |