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) |
|---|---|
| 3 | 1 |
| 4 | 3 |
| 5 | 7 |
| 6 | 14 |
| 7 | 30 |
| 8 | 57 |
| 9 | 119 |
| 10 | 224 |
| 11 | 460 |
| 12 | 867 |
| 13 | 1761 |
| 14 | 3338 |
| 15 | 6734 |
| 16 | 12861 |
| 17 | 25843 |
| 18 | 49748 |
| 19 | 99744 |
| 20 | 193431 |
| 21 | 387365 |
| 22 | 756062 |
| 23 | 1513138 |
| 24 | 2969265 |
| 25 | 5940567 |
| 26 | 11708072 |
| 27 | 23420228 |
| 28 | 46317195 |
| 29 | 92642569 |
| 30 | 183707186 |
| 31 | 367430742 |
| 32 | 730111269 |
| 33 | 1460255291 |
| 34 | 2906227196 |
| 35 | 5812519912 |
| 36 | 11582124159 |