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) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 6 |
| 7 | 12 |
| 8 | 8 |
| 9 | 20 |
| 10 | 54 |
| 11 | 148 |
| 12 | 136 |
| 13 | 144 |
| 14 | 612 |
| 15 | 1200 |
| 16 | 1344 |
| 17 | 2448 |
| 18 | 10506 |
| 19 | 16848 |
| 20 | 13824 |
| 21 | 22000 |
| 22 | 83232 |
| 23 | 148716 |
| 24 | 205368 |
| 25 | 377736 |
| 26 | 920160 |
| 27 | 1694088 |
| 28 | 1880304 |
| 29 | 3290112 |
| 30 | 14839968 |
| 31 | 22472640 |
| 32 | 17805312 |
| 33 | 42407136 |
| 34 | 117876096 |
| 35 | 327661128 |
| 36 | 178588800 |
| 37 | 561863168 |
| 38 | 1604383200 |