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 | 1 |
| 7 | 2 |
| 8 | 5 |
| 9 | 12 |
| 10 | 23 |
| 11 | 42 |
| 12 | 85 |
| 13 | 144 |
| 14 | 251 |
| 15 | 454 |
| 16 | 753 |
| 17 | 1244 |
| 18 | 2183 |
| 19 | 3506 |
| 20 | 5725 |
| 21 | 9736 |
| 22 | 15539 |
| 23 | 24926 |
| 24 | 41993 |
| 25 | 66228 |
| 26 | 105823 |
| 27 | 176138 |
| 28 | 277173 |
| 29 | 439648 |
| 30 | 729099 |
| 31 | 1141430 |
| 32 | 1807713 |
| 33 | 2981900 |
| 34 | 4663991 |
| 35 | 7361890 |
| 36 | 12124173 |
| 37 | 18918072 |
| 38 | 29840739 |
| 39 | 49020942 |