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) |
|---|---|
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 3 |
| 7 | 2 |
| 8 | 9 |
| 9 | 6 |
| 10 | 29 |
| 11 | 30 |
| 12 | 99 |
| 13 | 112 |
| 14 | 351 |
| 15 | 450 |
| 16 | 1275 |
| 17 | 1734 |
| 18 | 4707 |
| 19 | 6762 |
| 20 | 17577 |
| 21 | 26208 |
| 22 | 66197 |
| 23 | 101862 |
| 24 | 250953 |
| 25 | 395804 |
| 26 | 956385 |
| 27 | 1540110 |
| 28 | 3660541 |
| 29 | 5997600 |
| 30 | 14061141 |
| 31 | 23382294 |
| 32 | 54177741 |
| 33 | 91246662 |
| 34 | 209295261 |
| 35 | 356432166 |
| 36 | 810375651 |
| 37 | 1393592512 |