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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 8 |
| 7 | 1 |
| 8 | 24 |
| 9 | 6 |
| 10 | 122 |
| 11 | 1 |
| 12 | 744 |
| 13 | 1 |
| 14 | 5042 |
| 15 | 126 |
| 16 | 40320 |
| 17 | 1 |
| 18 | 363600 |
| 19 | 1 |
| 20 | 3628824 |
| 21 | 5046 |
| 22 | 39916802 |
| 23 | 1 |
| 24 | 479041920 |
| 25 | 120 |
| 26 | 6227020802 |
| 27 | 362880 |
| 28 | 87178291224 |
| 29 | 1 |
| 30 | 1307677997520 |
| 31 | 1 |
| 32 | 20922789888000 |
| 33 | 39916806 |
| 34 | 355687428096002 |
| 35 | 5160 |
| 36 | 6402374184729600 |
| 37 | 1 |