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 | 2 |
| 10 | 100 |
| 11 | 908 |
| 12 | 4872 |
| 13 | 19818 |
| 14 | 66864 |
| 15 | 193926 |
| 16 | 498924 |
| 17 | 1165544 |
| 18 | 2517036 |
| 19 | 5089430 |
| 20 | 9731908 |
| 21 | 17735888 |
| 22 | 30999920 |
| 23 | 52234274 |
| 24 | 85210284 |
| 25 | 135059570 |
| 26 | 208627984 |
| 27 | 314889330 |
| 28 | 465423908 |
| 29 | 674966914 |
| 30 | 962031720 |
| 31 | 1349613074 |