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 | 1 |
| 3 | 0 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 12 |
| 8 | 21 |
| 9 | 36 |
| 10 | 43 |
| 11 | 88 |
| 12 | 133 |
| 13 | 222 |
| 14 | 331 |
| 15 | 450 |
| 16 | 753 |
| 17 | 1120 |
| 18 | 1703 |
| 19 | 2508 |
| 20 | 3753 |
| 21 | 5010 |
| 22 | 7807 |
| 23 | 11020 |
| 24 | 16243 |
| 25 | 22974 |
| 26 | 33277 |
| 27 | 46764 |
| 28 | 63639 |
| 29 | 91822 |
| 30 | 127943 |
| 31 | 180048 |
| 32 | 249585 |
| 33 | 348204 |
| 34 | 480361 |
| 35 | 664618 |
| 36 | 884833 |
| 37 | 1237470 |
| 38 | 1675087 |
| 39 | 2299104 |
| 40 | 3103203 |
| 41 | 4234072 |
| 42 | 5700371 |