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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 12 |
| 6 | 24 |
| 7 | 44 |
| 8 | 88 |
| 9 | 176 |
| 10 | 344 |
| 11 | 688 |
| 12 | 1376 |
| 13 | 2736 |
| 14 | 5472 |
| 15 | 10944 |
| 16 | 21856 |
| 17 | 43712 |
| 18 | 87424 |
| 19 | 174784 |
| 20 | 349568 |
| 21 | 699136 |
| 22 | 1398144 |
| 23 | 2796288 |
| 24 | 5592576 |
| 25 | 11184896 |
| 26 | 22369792 |
| 27 | 44739584 |
| 28 | 89478656 |
| 29 | 178957312 |
| 30 | 357914624 |
| 31 | 715828224 |
| 32 | 1431656448 |
| 33 | 2863312896 |