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 | 2 |
| 1 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 0 |
| 5 | 2 |
| 6 | 2 |
| 7 | 2 |
| 8 | 4 |
| 9 | 4 |
| 10 | 6 |
| 11 | 8 |
| 12 | 10 |
| 13 | 14 |
| 14 | 18 |
| 15 | 24 |
| 16 | 32 |
| 17 | 42 |
| 18 | 56 |
| 19 | 74 |
| 20 | 98 |
| 21 | 130 |
| 22 | 172 |
| 23 | 228 |
| 24 | 302 |
| 25 | 400 |
| 26 | 530 |
| 27 | 702 |
| 28 | 930 |
| 29 | 1232 |
| 30 | 1632 |
| 31 | 2162 |
| 32 | 2864 |
| 33 | 3794 |
| 34 | 5026 |
| 35 | 6658 |
| 36 | 8820 |
| 37 | 11684 |
| 38 | 15478 |
| 39 | 20504 |
| 40 | 27162 |
| 41 | 35982 |
| 42 | 47666 |
| 43 | 63144 |
| 44 | 83648 |
| 45 | 110810 |
| 46 | 146792 |
| 47 | 194458 |
| 48 | 257602 |
| 49 | 341250 |