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 | 6 |
| 4 | 8 |
| 5 | 15 |
| 6 | 30 |
| 7 | 49 |
| 8 | 96 |
| 9 | 189 |
| 10 | 360 |
| 11 | 693 |
| 12 | 1416 |
| 13 | 2743 |
| 14 | 5516 |
| 15 | 10980 |
| 16 | 21952 |
| 17 | 43707 |
| 18 | 87642 |
| 19 | 174781 |
| 20 | 349920 |
| 21 | 699216 |
| 22 | 1398804 |
| 23 | 2796225 |
| 24 | 5594112 |
| 25 | 11184875 |
| 26 | 22372376 |
| 27 | 44739810 |
| 28 | 89484080 |
| 29 | 178956999 |
| 30 | 357926040 |
| 31 | 715827913 |
| 32 | 1431677824 |
| 33 | 2863313640 |