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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 9 |
| 5 | 18 |
| 6 | 35 |
| 7 | 71 |
| 8 | 144 |
| 9 | 294 |
| 10 | 601 |
| 11 | 1231 |
| 12 | 2526 |
| 13 | 5191 |
| 14 | 10672 |
| 15 | 21950 |
| 16 | 45159 |
| 17 | 92920 |
| 18 | 191214 |
| 19 | 393512 |
| 20 | 809864 |
| 21 | 1666775 |
| 22 | 3430425 |
| 23 | 7060297 |
| 24 | 14531166 |
| 25 | 29907455 |
| 26 | 61554442 |
| 27 | 126689294 |
| 28 | 260747884 |
| 29 | 536663296 |
| 30 | 1104544280 |
| 31 | 2273340315 |