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 | 19 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 18 |
| 6 | 36 |
| 7 | 72 |
| 8 | 106 |
| 9 | 450 |
| 10 | 562 |
| 11 | 2312 |
| 12 | 1156 |
| 13 | 9522 |
| 14 | 1381 |
| 15 | 8712 |
| 16 | 4930 |
| 17 | 16562 |
| 18 | 13812 |
| 19 | 35912 |
| 20 | 14862 |
| 21 | 233928 |
| 22 | 53316 |
| 23 | 361250 |
| 24 | 40056 |
| 25 | 211250 |
| 26 | 55981 |
| 27 | 1678112 |
| 28 | 51106 |
| 29 | 1216800 |
| 30 | 305256 |
| 31 | 610512 |
| 32 | 255531 |