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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 15 |
| 7 | 27 |
| 8 | 47 |
| 9 | 87 |
| 10 | 167 |
| 11 | 327 |
| 12 | 635 |
| 13 | 1263 |
| 14 | 2519 |
| 15 | 5007 |
| 16 | 10007 |
| 17 | 19947 |
| 18 | 39875 |
| 19 | 79739 |
| 20 | 159399 |
| 21 | 318779 |
| 22 | 637503 |
| 23 | 1274999 |
| 24 | 2549979 |
| 25 | 5099903 |
| 26 | 10199787 |
| 27 | 20399535 |
| 28 | 40799063 |
| 29 | 81598083 |
| 30 | 163196135 |
| 31 | 326392259 |
| 32 | 652784499 |
| 33 | 1305568943 |
| 34 | 2611137839 |