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 | 12 |
| 6 | 15 |
| 7 | 1 |
| 8 | 39 |
| 9 | 135 |
| 10 | 105 |
| 11 | 1 |
| 12 | 120 |
| 13 | 870 |
| 14 | 1680 |
| 15 | 945 |
| 16 | 1 |
| 17 | 363 |
| 18 | 4950 |
| 19 | 17850 |
| 20 | 23625 |
| 21 | 10395 |
| 22 | 1 |
| 23 | 1092 |
| 24 | 26565 |
| 25 | 159600 |
| 26 | 373275 |
| 27 | 374220 |
| 28 | 135135 |
| 29 | 1 |
| 30 | 3279 |
| 31 | 138285 |
| 32 | 1303155 |
| 33 | 4795875 |
| 34 | 8222445 |
| 35 | 6621615 |
| 36 | 2027025 |