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) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 14 |
| 3 | 32 |
| 4 | 68 |
| 5 | 140 |
| 6 | 284 |
| 7 | 572 |
| 8 | 1148 |
| 9 | 2300 |
| 10 | 4604 |
| 11 | 9212 |
| 12 | 18428 |
| 13 | 36860 |
| 14 | 73724 |
| 15 | 147452 |
| 16 | 294908 |
| 17 | 589820 |
| 18 | 1179644 |
| 19 | 2359292 |
| 20 | 4718588 |
| 21 | 9437180 |
| 22 | 18874364 |
| 23 | 37748732 |
| 24 | 75497468 |
| 25 | 150994940 |
| 26 | 301989884 |
| 27 | 603979772 |
| 28 | 1207959548 |
| 29 | 2415919100 |