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) |
|---|---|
| 7 | 1 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 1 |
| 15 | 8 |
| 16 | 36 |
| 17 | 120 |
| 18 | 330 |
| 19 | 792 |
| 20 | 1716 |
| 21 | 3433 |
| 22 | 6443 |
| 23 | 11484 |
| 24 | 19640 |
| 25 | 32550 |
| 26 | 52860 |
| 27 | 85296 |
| 28 | 139249 |
| 29 | 235001 |
| 30 | 418473 |
| 31 | 795544 |
| 32 | 1610418 |
| 33 | 3421514 |
| 34 | 7489962 |
| 35 | 16625389 |
| 36 | 37003313 |
| 37 | 82024320 |
| 38 | 180421399 |
| 39 | 393126594 |
| 40 | 848051064 |
| 41 | 1811227670 |
| 42 | 3831269241 |
| 43 | 8030748161 |