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 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 4 |
| 6 | 1 |
| 7 | 36 |
| 8 | 12 |
| 9 | 9 |
| 10 | 1 |
| 11 | 288 |
| 12 | 192 |
| 13 | 288 |
| 14 | 192 |
| 15 | 1 |
| 16 | 7200 |
| 17 | 576 |
| 18 | 1440 |
| 19 | 2880 |
| 20 | 1800 |
| 21 | 1 |
| 22 | 5400 |
| 23 | 51840 |
| 24 | 11520 |
| 25 | 103680 |
| 26 | 172800 |
| 27 | 103680 |
| 28 | 1 |
| 29 | 264600 |
| 30 | 259200 |
| 31 | 1209600 |
| 32 | 103680 |
| 33 | 44800 |
| 34 | 3628800 |
| 35 | 2116800 |
| 36 | 1 |
| 37 | 33868800 |
| 38 | 58060800 |
| 39 | 58060800 |
| 40 | 3686400 |
| 41 | 29030400 |
| 42 | 4300800 |
| 43 | 406425600 |
| 44 | 232243200 |