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 | 1 |
| 1 | 2 |
| 2 | 1 |
| 3 | 4 |
| 4 | 6 |
| 5 | 12 |
| 6 | 29 |
| 7 | 56 |
| 8 | 134 |
| 9 | 300 |
| 10 | 682 |
| 11 | 1624 |
| 12 | 3772 |
| 13 | 9016 |
| 14 | 21597 |
| 15 | 51888 |
| 16 | 126086 |
| 17 | 306636 |
| 18 | 750398 |
| 19 | 1843864 |
| 20 | 4543604 |
| 21 | 11242088 |
| 22 | 27887730 |
| 23 | 69378192 |
| 24 | 173050396 |
| 25 | 432596216 |
| 26 | 1083862132 |
| 27 | 2720961520 |
| 28 | 6843557944 |
| 29 | 17242789104 |
| 30 | 43514507997 |
| 31 | 109983815264 |
| 32 | 278385212358 |