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) |
|---|---|
| 4 | 1 |
| 5 | 8 |
| 6 | 1 |
| 7 | 72 |
| 8 | 18 |
| 9 | 1 |
| 10 | 720 |
| 11 | 270 |
| 12 | 30 |
| 13 | 1 |
| 14 | 7920 |
| 15 | 3960 |
| 16 | 660 |
| 17 | 44 |
| 18 | 1 |
| 19 | 95040 |
| 20 | 59400 |
| 21 | 13200 |
| 22 | 1320 |
| 23 | 60 |
| 24 | 1 |
| 25 | 1235520 |
| 26 | 926640 |
| 27 | 257400 |
| 28 | 34320 |
| 29 | 2340 |
| 30 | 78 |
| 31 | 1 |
| 32 | 17297280 |
| 33 | 15135120 |
| 34 | 5045040 |
| 35 | 840840 |
| 36 | 76440 |
| 37 | 3822 |
| 38 | 98 |
| 39 | 1 |
| 40 | 259459200 |
| 41 | 259459200 |
| 42 | 100900800 |
| 43 | 20180160 |
| 44 | 2293200 |