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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 2 |
| 8 | 10 |
| 9 | 22 |
| 10 | 54 |
| 11 | 52 |
| 12 | 534 |
| 13 | 523 |
| 14 | 1339 |
| 15 | 3218 |
| 16 | 9315 |
| 17 | 2177 |
| 18 | 29426 |
| 19 | 15423 |
| 20 | 101314 |
| 21 | 140072 |
| 22 | 110794 |
| 23 | 46748 |
| 24 | 1639279 |
| 25 | 710736 |
| 26 | 970251 |
| 27 | 3002062 |
| 28 | 8462256 |
| 29 | 895291 |
| 30 | 29458807 |