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 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 32 |
| 6 | 62 |
| 7 | 122 |
| 8 | 240 |
| 9 | 472 |
| 10 | 928 |
| 11 | 1824 |
| 12 | 3586 |
| 13 | 7050 |
| 14 | 13860 |
| 15 | 27248 |
| 16 | 53568 |
| 17 | 105312 |
| 18 | 207038 |
| 19 | 407026 |
| 20 | 800192 |
| 21 | 1573136 |
| 22 | 3092704 |
| 23 | 6080096 |
| 24 | 11953154 |
| 25 | 23499282 |
| 26 | 46198372 |
| 27 | 90823608 |
| 28 | 178554512 |
| 29 | 351028928 |
| 30 | 690104702 |
| 31 | 1356710122 |
| 32 | 2667221872 |