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 | 4 |
| 4 | 2 |
| 5 | 1 |
| 6 | 18 |
| 7 | 12 |
| 8 | 3 |
| 9 | 1 |
| 10 | 120 |
| 11 | 72 |
| 12 | 24 |
| 13 | 4 |
| 14 | 1 |
| 15 | 960 |
| 16 | 600 |
| 17 | 180 |
| 18 | 40 |
| 19 | 5 |
| 20 | 1 |
| 21 | 9360 |
| 22 | 5760 |
| 23 | 1800 |
| 24 | 360 |
| 25 | 60 |
| 26 | 6 |
| 27 | 1 |
| 28 | 105840 |
| 29 | 65520 |
| 30 | 20160 |
| 31 | 4200 |
| 32 | 630 |
| 33 | 84 |
| 34 | 7 |
| 35 | 1 |
| 36 | 1370880 |
| 37 | 846720 |
| 38 | 262080 |
| 39 | 53760 |
| 40 | 8400 |
| 41 | 1008 |
| 42 | 112 |
| 43 | 8 |
| 44 | 1 |
| 45 | 19958400 |
| 46 | 12337920 |
| 47 | 3810240 |
| 48 | 786240 |
| 49 | 120960 |
| 50 | 15120 |
| 51 | 1512 |
| 52 | 144 |
| 53 | 9 |
| 54 | 1 |