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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 13 |
| 5 | 16 |
| 6 | 50 |
| 7 | 46 |
| 8 | 331 |
| 9 | 710 |
| 10 | 1530 |
| 11 | 1968 |
| 12 | 6694 |
| 13 | 8352 |
| 14 | 15550 |
| 15 | 24890 |
| 16 | 133573 |
| 17 | 181552 |
| 18 | 486054 |
| 19 | 641978 |
| 20 | 1840816 |
| 21 | 3296140 |
| 22 | 6314768 |
| 23 | 7452540 |
| 24 | 34421218 |
| 25 | 59313706 |
| 26 | 110347662 |
| 27 | 258695534 |
| 28 | 627750404 |
| 29 | 874913936 |
| 30 | 2053073798 |
| 31 | 2556088458 |
| 32 | 12615058063 |
| 33 | 22442790438 |