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 | 3 |
| 1 | 4 |
| 2 | 7 |
| 3 | 14 |
| 4 | 25 |
| 5 | 46 |
| 6 | 85 |
| 7 | 156 |
| 8 | 287 |
| 9 | 528 |
| 10 | 971 |
| 11 | 1786 |
| 12 | 3285 |
| 13 | 6042 |
| 14 | 11113 |
| 15 | 20440 |
| 16 | 37595 |
| 17 | 69148 |
| 18 | 127183 |
| 19 | 233926 |
| 20 | 430257 |
| 21 | 791366 |
| 22 | 1455549 |
| 23 | 2677172 |
| 24 | 4924087 |
| 25 | 9056808 |
| 26 | 16658067 |
| 27 | 30638962 |
| 28 | 56353837 |
| 29 | 103650866 |
| 30 | 190643665 |
| 31 | 350648368 |
| 32 | 644942899 |