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 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 11 |
| 7 | 23 |
| 8 | 45 |
| 9 | 95 |
| 10 | 194 |
| 11 | 414 |
| 12 | 863 |
| 13 | 1850 |
| 14 | 3910 |
| 15 | 8413 |
| 16 | 17887 |
| 17 | 38517 |
| 18 | 82249 |
| 19 | 177133 |
| 20 | 378871 |
| 21 | 815265 |
| 22 | 1745006 |
| 23 | 3750385 |
| 24 | 8024725 |
| 25 | 17219142 |
| 26 | 36817113 |