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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 0 |
| 7 | 11 |
| 8 | 4 |
| 9 | 2 |
| 10 | 34 |
| 11 | 1 |
| 12 | 64 |
| 13 | 37 |
| 14 | 173 |
| 15 | 438 |
| 16 | 394 |
| 17 | 118 |
| 18 | 1160 |
| 19 | 1663 |
| 20 | 1 |
| 21 | 6466 |
| 22 | 14508 |
| 23 | 20764 |
| 24 | 38368 |
| 25 | 18257 |
| 26 | 99928 |
| 27 | 64234 |
| 28 | 202972 |
| 29 | 15836 |
| 30 | 410224 |
| 31 | 184593 |
| 32 | 1520257 |
| 33 | 538006 |
| 34 | 2773540 |
| 35 | 5886173 |
| 36 | 9996832 |
| 37 | 5132559 |
| 38 | 9902536 |
| 39 | 21703576 |
| 40 | 33466456 |