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) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 1 |
| 4 | 6 |
| 5 | 6 |
| 6 | 21 |
| 7 | 30 |
| 8 | 82 |
| 9 | 141 |
| 10 | 342 |
| 11 | 650 |
| 12 | 1485 |
| 13 | 2982 |
| 14 | 6612 |
| 15 | 13693 |
| 16 | 29922 |
| 17 | 63072 |
| 18 | 136905 |
| 19 | 291618 |
| 20 | 631302 |
| 21 | 1353441 |
| 22 | 2928054 |
| 23 | 6303798 |
| 24 | 13642117 |
| 25 | 29454702 |
| 26 | 63791456 |
| 27 | 138020533 |
| 28 | 299191968 |
| 29 | 648376932 |
| 30 | 1406836717 |
| 31 | 3052671816 |
| 32 | 6629649798 |
| 33 | 14400972413 |
| 34 | 31301837952 |