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 | 2 |
| 2 | 3 |
| 3 | 6 |
| 4 | 11 |
| 5 | 20 |
| 6 | 39 |
| 7 | 78 |
| 8 | 157 |
| 9 | 314 |
| 10 | 624 |
| 11 | 1245 |
| 12 | 2491 |
| 13 | 4982 |
| 14 | 9962 |
| 15 | 19920 |
| 16 | 39844 |
| 17 | 79688 |
| 18 | 159360 |
| 19 | 318725 |
| 20 | 637461 |
| 21 | 1274918 |
| 22 | 2549834 |
| 23 | 5099650 |
| 24 | 10199301 |
| 25 | 20398664 |
| 26 | 40797327 |
| 27 | 81594626 |
| 28 | 163189197 |
| 29 | 326378284 |
| 30 | 652756722 |
| 31 | 1305513583 |
| 32 | 2611027094 |