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) |
|---|---|
| 9 | 1 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 4862 |
| 19 | 16796 |
| 20 | 41990 |
| 21 | 90440 |
| 22 | 177650 |
| 23 | 326876 |
| 24 | 572033 |
| 25 | 961400 |
| 26 | 1562275 |
| 27 | 416782080 |
| 28 | 2904006105 |
| 29 | 20591110410 |
| 30 | 93272863125 |
| 31 | 429784750200 |
| 32 | 1588873361400 |
| 33 | 5988317533044 |
| 34 | 19637330636352 |
| 35 | 65753496366140 |
| 36 | 376581209597560 |
| 37 | 2635731247693060 |