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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 1 |
| 13 | 11 |
| 14 | 76 |
| 15 | 403 |
| 16 | 1817 |
| 17 | 7309 |
| 18 | 27079 |
| 19 | 94252 |
| 20 | 312620 |
| 21 | 998058 |
| 22 | 3090168 |
| 23 | 9331500 |
| 24 | 27604348 |
| 25 | 80270182 |
| 26 | 230077622 |
| 27 | 651469482 |
| 28 | 1825536305 |
| 29 | 5069886635 |
| 30 | 13971416287 |
| 31 | 38242837777 |
| 32 | 104061066617 |
| 33 | 281680779030 |
| 34 | 758947045088 |