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 | 4 |
| 4 | 8 |
| 5 | 15 |
| 6 | 33 |
| 7 | 67 |
| 8 | 152 |
| 9 | 340 |
| 10 | 791 |
| 11 | 1845 |
| 12 | 4411 |
| 13 | 10557 |
| 14 | 25600 |
| 15 | 62332 |
| 16 | 152780 |
| 17 | 375859 |
| 18 | 928841 |
| 19 | 2302191 |
| 20 | 5724425 |
| 21 | 14269196 |
| 22 | 35655157 |
| 23 | 89277769 |
| 24 | 223982893 |
| 25 | 562912585 |
| 26 | 1417014038 |
| 27 | 3572323492 |
| 28 | 9018370892 |
| 29 | 22796073015 |
| 30 | 57691327693 |
| 31 | 146165207035 |
| 32 | 370706641856 |
| 33 | 941111617892 |
| 34 | 2391394225355 |
| 35 | 6081869637093 |