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 | 0 |
| 4 | 1 |
| 5 | 3 |
| 6 | 8 |
| 7 | 14 |
| 8 | 29 |
| 9 | 53 |
| 10 | 100 |
| 11 | 180 |
| 12 | 343 |
| 13 | 623 |
| 14 | 1172 |
| 15 | 2182 |
| 16 | 4105 |
| 17 | 7701 |
| 18 | 14590 |
| 19 | 27584 |
| 20 | 52475 |
| 21 | 99867 |
| 22 | 190732 |
| 23 | 364710 |
| 24 | 699237 |
| 25 | 1342169 |
| 26 | 2581412 |
| 27 | 4971052 |
| 28 | 9587563 |
| 29 | 18512775 |
| 30 | 35792550 |
| 31 | 69273650 |
| 32 | 134219777 |
| 33 | 260301157 |
| 34 | 505294108 |
| 35 | 981706812 |