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 | 6 |
| 2 | 1 |
| 3 | 40 |
| 4 | 10 |
| 5 | 1 |
| 6 | 280 |
| 7 | 84 |
| 8 | 14 |
| 9 | 1 |
| 10 | 2016 |
| 11 | 672 |
| 12 | 144 |
| 13 | 18 |
| 14 | 1 |
| 15 | 14784 |
| 16 | 5280 |
| 17 | 1320 |
| 18 | 220 |
| 19 | 22 |
| 20 | 1 |
| 21 | 109824 |
| 22 | 41184 |
| 23 | 11440 |
| 24 | 2288 |
| 25 | 312 |
| 26 | 26 |
| 27 | 1 |
| 28 | 823680 |
| 29 | 320320 |
| 30 | 96096 |
| 31 | 21840 |
| 32 | 3640 |
| 33 | 420 |
| 34 | 30 |
| 35 | 1 |
| 36 | 6223360 |
| 37 | 2489344 |
| 38 | 792064 |
| 39 | 198016 |
| 40 | 38080 |
| 41 | 5440 |
| 42 | 544 |
| 43 | 34 |
| 44 | 1 |
| 45 | 47297536 |
| 46 | 19348992 |
| 47 | 6449664 |
| 48 | 1736448 |
| 49 | 372096 |
| 50 | 62016 |
| 51 | 7752 |