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 | 1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 7 |
| 8 | 12 |
| 9 | 24 |
| 10 | 45 |
| 11 | 91 |
| 12 | 176 |
| 13 | 352 |
| 14 | 693 |
| 15 | 1387 |
| 16 | 2752 |
| 17 | 5504 |
| 18 | 10965 |
| 19 | 21931 |
| 20 | 43776 |
| 21 | 87552 |
| 22 | 174933 |
| 23 | 349867 |
| 24 | 699392 |
| 25 | 1398784 |
| 26 | 2796885 |
| 27 | 5593771 |
| 28 | 11186176 |
| 29 | 22372352 |
| 30 | 44741973 |
| 31 | 89483947 |
| 32 | 178962432 |
| 33 | 357924864 |
| 34 | 715838805 |
| 35 | 1431677611 |
| 36 | 2863333376 |
| 37 | 5726666752 |