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 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 18 |
| 5 | 42 |
| 6 | 94 |
| 7 | 208 |
| 8 | 450 |
| 9 | 966 |
| 10 | 2052 |
| 11 | 4330 |
| 12 | 9074 |
| 13 | 18920 |
| 14 | 39266 |
| 15 | 81182 |
| 16 | 167268 |
| 17 | 343634 |
| 18 | 704122 |
| 19 | 1439496 |
| 20 | 2936906 |
| 21 | 5981174 |
| 22 | 12161332 |
| 23 | 24691514 |
| 24 | 50066690 |
| 25 | 101400616 |
| 26 | 205150098 |
| 27 | 414653998 |
| 28 | 837377988 |
| 29 | 1689714242 |
| 30 | 3407154474 |
| 31 | 6865700808 |
| 32 | 13826659450 |
| 33 | 27829885126 |