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 | 3 |
| 2 | 2 |
| 3 | 11 |
| 4 | 8 |
| 5 | 6 |
| 6 | 49 |
| 7 | 38 |
| 8 | 30 |
| 9 | 24 |
| 10 | 261 |
| 11 | 212 |
| 12 | 174 |
| 13 | 144 |
| 14 | 120 |
| 15 | 1631 |
| 16 | 1370 |
| 17 | 1158 |
| 18 | 984 |
| 19 | 840 |
| 20 | 720 |
| 21 | 11743 |
| 22 | 10112 |
| 23 | 8742 |
| 24 | 7584 |
| 25 | 6600 |
| 26 | 5760 |
| 27 | 5040 |
| 28 | 95901 |
| 29 | 84158 |
| 30 | 74046 |
| 31 | 65304 |
| 32 | 57720 |
| 33 | 51120 |
| 34 | 45360 |
| 35 | 40320 |
| 36 | 876809 |
| 37 | 780908 |
| 38 | 696750 |
| 39 | 622704 |
| 40 | 557400 |
| 41 | 499680 |
| 42 | 448560 |
| 43 | 403200 |
| 44 | 362880 |
| 45 | 8877691 |
| 46 | 8000882 |
| 47 | 7219974 |
| 48 | 6523224 |
| 49 | 5900520 |
| 50 | 5343120 |
| 51 | 4843440 |
| 52 | 4394880 |
| 53 | 3991680 |
| 54 | 3628800 |