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 | 2 |
| 4 | 1 |
| 5 | 2 |
| 6 | 1 |
| 7 | 4 |
| 8 | 4 |
| 9 | 8 |
| 10 | 12 |
| 11 | 18 |
| 12 | 28 |
| 13 | 40 |
| 14 | 60 |
| 15 | 91 |
| 16 | 134 |
| 17 | 203 |
| 18 | 302 |
| 19 | 455 |
| 20 | 681 |
| 21 | 1019 |
| 22 | 1535 |
| 23 | 2292 |
| 24 | 3447 |
| 25 | 5157 |
| 26 | 7759 |
| 27 | 11617 |
| 28 | 17458 |
| 29 | 26172 |
| 30 | 39270 |
| 31 | 58888 |
| 32 | 88328 |
| 33 | 132483 |
| 34 | 198711 |
| 35 | 298005 |
| 36 | 447096 |
| 37 | 670645 |
| 38 | 1005943 |
| 39 | 1509029 |
| 40 | 2263285 |