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 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 0 |
| 11 | 0 |
| 12 | 9 |
| 13 | 33 |
| 14 | 104 |
| 15 | 280 |
| 16 | 948 |
| 17 | 3014 |
| 18 | 9494 |
| 19 | 30302 |
| 20 | 98897 |
| 21 | 323372 |
| 22 | 1080168 |
| 23 | 3666666 |
| 24 | 12604812 |
| 25 | 43734613 |
| 26 | 153788715 |