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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 1 |
| 5 | 10 |
| 6 | 15 |
| 7 | 1 |
| 8 | 25 |
| 9 | 105 |
| 10 | 105 |
| 11 | 1 |
| 12 | 56 |
| 13 | 490 |
| 14 | 1260 |
| 15 | 945 |
| 16 | 1 |
| 17 | 119 |
| 18 | 1918 |
| 19 | 9450 |
| 20 | 17325 |
| 21 | 10395 |
| 22 | 1 |
| 23 | 246 |
| 24 | 6825 |
| 25 | 56980 |
| 26 | 190575 |
| 27 | 270270 |
| 28 | 135135 |
| 29 | 1 |
| 30 | 501 |
| 31 | 22935 |
| 32 | 302995 |
| 33 | 1636635 |
| 34 | 4099095 |
| 35 | 4729725 |
| 36 | 2027025 |
| 37 | 1 |
| 38 | 1012 |
| 39 | 74316 |
| 40 | 1487200 |
| 41 | 12122110 |
| 42 | 47507460 |
| 43 | 94594500 |
| 44 | 91891800 |
| 45 | 34459425 |