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 | 3 |
| 3 | 5 |
| 4 | 11 |
| 5 | 23 |
| 6 | 44 |
| 7 | 89 |
| 8 | 177 |
| 9 | 355 |
| 10 | 711 |
| 11 | 1420 |
| 12 | 2841 |
| 13 | 5683 |
| 14 | 11367 |
| 15 | 22731 |
| 16 | 45463 |
| 17 | 90925 |
| 18 | 181851 |
| 19 | 363703 |
| 20 | 727404 |
| 21 | 1454809 |
| 22 | 2909617 |
| 23 | 5819235 |
| 24 | 11638471 |
| 25 | 23276940 |
| 26 | 46553881 |
| 27 | 93107763 |
| 28 | 186215527 |
| 29 | 372431051 |
| 30 | 744862103 |
| 31 | 1489724205 |
| 32 | 2979448411 |
| 33 | 5958896823 |
| 34 | 11917793644 |