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 | 1 |
| 4 | 2 |
| 5 | 6 |
| 6 | 21 |
| 7 | 49 |
| 8 | 119 |
| 9 | 266 |
| 10 | 626 |
| 11 | 1315 |
| 12 | 2859 |
| 13 | 5878 |
| 14 | 12798 |
| 15 | 26038 |
| 16 | 54485 |
| 17 | 109976 |
| 18 | 230159 |
| 19 | 462634 |
| 20 | 945846 |
| 21 | 1897597 |
| 22 | 3893242 |
| 23 | 7798862 |
| 24 | 15834340 |
| 25 | 31695551 |
| 26 | 64315161 |
| 27 | 128693477 |
| 28 | 259241944 |
| 29 | 518614045 |
| 30 | 1046344906 |
| 31 | 2092965726 |
| 32 | 4206946359 |
| 33 | 8414499960 |