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) |
|---|---|
| 1 | 3 |
| 2 | 9 |
| 3 | 22 |
| 4 | 46 |
| 5 | 86 |
| 6 | 153 |
| 7 | 274 |
| 8 | 511 |
| 9 | 993 |
| 10 | 1966 |
| 11 | 3880 |
| 12 | 7558 |
| 13 | 14544 |
| 14 | 27819 |
| 15 | 53226 |
| 16 | 102217 |
| 17 | 197056 |
| 18 | 380656 |
| 19 | 735334 |
| 20 | 1418931 |
| 21 | 2734793 |
| 22 | 5267460 |
| 23 | 10145106 |
| 24 | 19545576 |
| 25 | 37670258 |
| 26 | 72617646 |
| 27 | 139990248 |
| 28 | 269844980 |
| 29 | 520094648 |
| 30 | 1002351809 |
| 31 | 1931757285 |
| 32 | 3723025114 |