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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 16 |
| 7 | 32 |
| 8 | 62 |
| 9 | 124 |
| 10 | 246 |
| 11 | 488 |
| 12 | 968 |
| 13 | 1920 |
| 14 | 3809 |
| 15 | 7554 |
| 16 | 14985 |
| 17 | 29724 |
| 18 | 58960 |
| 19 | 116952 |
| 20 | 231984 |
| 21 | 460160 |
| 22 | 912764 |
| 23 | 1810544 |
| 24 | 3591364 |
| 25 | 7123768 |
| 26 | 14130584 |
| 27 | 28029184 |
| 28 | 55598209 |
| 29 | 110283652 |
| 30 | 218756761 |
| 31 | 433922158 |
| 32 | 860720548 |
| 33 | 1707310512 |
| 34 | 3386591840 |
| 35 | 6717585472 |