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 | 1 |
| 5 | 3 |
| 6 | 9 |
| 7 | 24 |
| 8 | 61 |
| 9 | 141 |
| 10 | 322 |
| 11 | 713 |
| 12 | 1543 |
| 13 | 3289 |
| 14 | 6907 |
| 15 | 14353 |
| 16 | 29604 |
| 17 | 60640 |
| 18 | 123522 |
| 19 | 250645 |
| 20 | 506808 |
| 21 | 1022197 |
| 22 | 2057594 |
| 23 | 4135358 |
| 24 | 8301139 |
| 25 | 16648165 |
| 26 | 33364948 |
| 27 | 66831721 |
| 28 | 133814251 |
| 29 | 267850803 |
| 30 | 536026676 |
| 31 | 1072528081 |
| 32 | 2145745276 |
| 33 | 4292485526 |
| 34 | 8586405894 |
| 35 | 17174865820 |