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 | 8 |
| 11 | 80 |
| 12 | 524 |
| 13 | 2696 |
| 14 | 11398 |
| 15 | 41674 |
| 16 | 135315 |
| 17 | 398912 |
| 18 | 1083702 |
| 19 | 2746382 |
| 20 | 6552828 |
| 21 | 14833263 |
| 22 | 32050976 |
| 23 | 66448542 |
| 24 | 132748327 |
| 25 | 256487544 |
| 26 | 480786785 |
| 27 | 876729065 |
| 28 | 1558922942 |
| 29 | 2708486023 |
| 30 | 4606366231 |
| 31 | 7681025200 |
| 32 | 12575626106 |
| 33 | 20241643485 |