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 | 6 |
| 3 | 8 |
| 4 | 22 |
| 5 | 40 |
| 6 | 82 |
| 7 | 176 |
| 8 | 340 |
| 9 | 722 |
| 10 | 1450 |
| 11 | 2966 |
| 12 | 6096 |
| 13 | 12362 |
| 14 | 25384 |
| 15 | 51728 |
| 16 | 105698 |
| 17 | 216074 |
| 18 | 440962 |
| 19 | 901396 |
| 20 | 1840686 |
| 21 | 3760232 |
| 22 | 7681828 |
| 23 | 15689962 |
| 24 | 32053346 |
| 25 | 65473214 |
| 26 | 133745304 |
| 27 | 273208346 |
| 28 | 558081744 |
| 29 | 1140024080 |
| 30 | 2328745042 |
| 31 | 4757002434 |
| 32 | 9717279194 |
| 33 | 19849727740 |