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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 8 |
| 5 | 5 |
| 6 | 15 |
| 7 | 75 |
| 8 | 121 |
| 9 | 61 |
| 10 | 105 |
| 11 | 840 |
| 12 | 2478 |
| 13 | 3128 |
| 14 | 1385 |
| 15 | 945 |
| 16 | 11025 |
| 17 | 51030 |
| 18 | 115350 |
| 19 | 124921 |
| 20 | 50521 |
| 21 | 10395 |
| 22 | 166320 |
| 23 | 1105335 |
| 24 | 3859680 |
| 25 | 7365633 |
| 26 | 7158128 |
| 27 | 2702765 |