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 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 16 |
| 6 | 33 |
| 7 | 71 |
| 8 | 143 |
| 9 | 295 |
| 10 | 594 |
| 11 | 1206 |
| 12 | 2413 |
| 13 | 4871 |
| 14 | 9743 |
| 15 | 19559 |
| 16 | 39138 |
| 17 | 78428 |
| 18 | 156857 |
| 19 | 314047 |
| 20 | 628095 |
| 21 | 1256809 |
| 22 | 2513693 |
| 23 | 5028594 |
| 24 | 10057189 |
| 25 | 20116979 |
| 26 | 40233975 |
| 27 | 80472823 |
| 28 | 160945945 |
| 29 | 321901713 |
| 30 | 643803427 |
| 31 | 1287627061 |
| 32 | 2575254123 |
| 33 | 5150547536 |
| 34 | 10301096282 |