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 | 3 |
| 4 | 8 |
| 5 | 17 |
| 6 | 36 |
| 7 | 73 |
| 8 | 149 |
| 9 | 300 |
| 10 | 602 |
| 11 | 1205 |
| 12 | 2413 |
| 13 | 4827 |
| 14 | 9656 |
| 15 | 19314 |
| 16 | 38632 |
| 17 | 77265 |
| 18 | 154533 |
| 19 | 309067 |
| 20 | 618137 |
| 21 | 1236276 |
| 22 | 2472554 |
| 23 | 4945109 |
| 24 | 9890222 |
| 25 | 19780446 |
| 26 | 39560894 |
| 27 | 79121791 |
| 28 | 158243585 |
| 29 | 316487171 |
| 30 | 632974345 |
| 31 | 1265948691 |
| 32 | 2531897387 |