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 | 0 |
| 3 | 0 |
| 4 | 6 |
| 5 | 60 |
| 6 | 30 |
| 7 | 210 |
| 8 | 24 |
| 9 | 84 |
| 10 | 60 |
| 11 | 198 |
| 12 | 330 |
| 13 | 1716 |
| 14 | 546 |
| 15 | 2730 |
| 16 | 252 |
| 17 | 4080 |
| 18 | 36 |
| 19 | 5814 |
| 20 | 210 |
| 21 | 7980 |
| 22 | 2310 |
| 23 | 10626 |
| 24 | 924 |
| 25 | 1380 |
| 26 | 1248 |
| 27 | 90 |
| 28 | 4914 |
| 29 | 4176 |
| 30 | 6090 |
| 31 | 26970 |
| 32 | 480 |
| 33 | 32736 |
| 34 | 1224 |
| 35 | 39270 |
| 36 | 1938 |
| 37 | 46620 |
| 38 | 2394 |
| 39 | 54834 |
| 40 | 4560 |
| 41 | 63960 |
| 42 | 4620 |
| 43 | 74046 |
| 44 | 19866 |
| 45 | 85140 |
| 46 | 22770 |
| 47 | 97290 |