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 | 4 |
| 4 | 1 |
| 5 | 12 |
| 6 | 22 |
| 7 | 1 |
| 8 | 24 |
| 9 | 120 |
| 10 | 140 |
| 11 | 1 |
| 12 | 40 |
| 13 | 380 |
| 14 | 1140 |
| 15 | 969 |
| 16 | 1 |
| 17 | 60 |
| 18 | 920 |
| 19 | 5060 |
| 20 | 10626 |
| 21 | 7084 |
| 22 | 1 |
| 23 | 84 |
| 24 | 1890 |
| 25 | 16380 |
| 26 | 61425 |
| 27 | 98280 |
| 28 | 53820 |
| 29 | 1 |
| 30 | 112 |
| 31 | 3472 |
| 32 | 43400 |
| 33 | 251720 |
| 34 | 704816 |
| 35 | 906192 |
| 36 | 420732 |
| 37 | 1 |
| 38 | 144 |
| 39 | 5880 |
| 40 | 99960 |
| 41 | 824670 |
| 42 | 3518592 |
| 43 | 7791168 |
| 44 | 8347680 |
| 45 | 3362260 |