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) |
|---|---|
| 1 | 4 |
| 2 | 4 |
| 3 | 8 |
| 4 | 10 |
| 5 | 17 |
| 6 | 24 |
| 7 | 46 |
| 8 | 94 |
| 9 | 139 |
| 10 | 241 |
| 11 | 416 |
| 12 | 688 |
| 13 | 1170 |
| 14 | 1969 |
| 15 | 3345 |
| 16 | 5674 |
| 17 | 9527 |
| 18 | 16316 |
| 19 | 27464 |
| 20 | 46668 |
| 21 | 78897 |
| 22 | 134097 |
| 23 | 226457 |
| 24 | 381906 |
| 25 | 645210 |
| 26 | 1093472 |
| 27 | 1843869 |
| 28 | 3127129 |
| 29 | 5278196 |