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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 4 |
| 9 | 8 |
| 10 | 13 |
| 11 | 19 |
| 12 | 38 |
| 13 | 79 |
| 14 | 153 |
| 15 | 273 |
| 16 | 509 |
| 17 | 999 |
| 18 | 1979 |
| 19 | 3818 |
| 20 | 7331 |
| 21 | 14279 |
| 22 | 28189 |
| 23 | 55599 |
| 24 | 109275 |
| 25 | 215165 |
| 26 | 426093 |
| 27 | 846638 |
| 28 | 1683215 |
| 29 | 3348212 |
| 30 | 6673679 |
| 31 | 13333171 |
| 32 | 26679522 |
| 33 | 53437369 |
| 34 | 107151335 |
| 35 | 215154204 |
| 36 | 432586412 |
| 37 | 870678377 |
| 38 | 1754094266 |