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) |
|---|---|
| 2 | 0 |
| 3 | 1 |
| 4 | 14 |
| 5 | 75 |
| 6 | 265 |
| 7 | 735 |
| 8 | 1736 |
| 9 | 3654 |
| 10 | 7050 |
| 11 | 12705 |
| 12 | 21670 |
| 13 | 35321 |
| 14 | 55419 |
| 15 | 84175 |
| 16 | 124320 |
| 17 | 179180 |
| 18 | 252756 |
| 19 | 349809 |
| 20 | 475950 |
| 21 | 637735 |
| 22 | 842765 |
| 23 | 1099791 |
| 24 | 1418824 |
| 25 | 1811250 |
| 26 | 2289950 |
| 27 | 2869425 |
| 28 | 3565926 |
| 29 | 4397589 |
| 30 | 5384575 |
| 31 | 6549215 |
| 32 | 7916160 |
| 33 | 9512536 |