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) |
|---|---|
| 5 | 18 |
| 6 | 36 |
| 7 | 70 |
| 8 | 134 |
| 9 | 258 |
| 10 | 498 |
| 11 | 960 |
| 12 | 1850 |
| 13 | 3566 |
| 14 | 6874 |
| 15 | 13250 |
| 16 | 25540 |
| 17 | 49230 |
| 18 | 94894 |
| 19 | 182914 |
| 20 | 352578 |
| 21 | 679616 |
| 22 | 1310002 |
| 23 | 2525110 |
| 24 | 4867306 |
| 25 | 9382034 |
| 26 | 18084452 |
| 27 | 34858902 |
| 28 | 67192694 |
| 29 | 129518082 |
| 30 | 249654130 |
| 31 | 481223808 |
| 32 | 927588714 |
| 33 | 1787984734 |
| 34 | 3446451386 |