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) |
|---|---|
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 11 |
| 7 | 22 |
| 8 | 45 |
| 9 | 90 |
| 10 | 184 |
| 11 | 370 |
| 12 | 751 |
| 13 | 1516 |
| 14 | 3053 |
| 15 | 6172 |
| 16 | 12405 |
| 17 | 25042 |
| 18 | 50323 |
| 19 | 101424 |
| 20 | 203880 |
| 21 | 410296 |
| 22 | 824871 |
| 23 | 1658338 |
| 24 | 3333405 |
| 25 | 6696814 |
| 26 | 13457112 |
| 27 | 27021758 |
| 28 | 54278993 |
| 29 | 108952646 |
| 30 | 218765704 |
| 31 | 439001338 |
| 32 | 881134467 |