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) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 7 |
| 4 | 0 |
| 5 | 21 |
| 6 | 37 |
| 7 | 118 |
| 8 | 56 |
| 9 | 19 |
| 10 | 428 |
| 11 | 808 |
| 12 | 3920 |
| 13 | 2256 |
| 14 | 15240 |
| 15 | 28312 |
| 16 | 46733 |
| 17 | 128931 |
| 18 | 251439 |
| 19 | 434788 |
| 20 | 645833 |
| 21 | 1397733 |
| 22 | 1179155 |
| 23 | 7185704 |
| 24 | 1551886 |
| 25 | 33308648 |
| 26 | 65879944 |
| 27 | 121274199 |
| 28 | 65829274 |
| 29 | 228529703 |
| 30 | 248939750 |
| 31 | 799831532 |
| 32 | 2835988891 |
| 33 | 1358930753 |
| 34 | 9419331043 |
| 35 | 9093076436 |