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 | 1 |
| 1 | 2 |
| 2 | 11 |
| 3 | 36 |
| 4 | 117 |
| 5 | 342 |
| 6 | 967 |
| 7 | 2648 |
| 8 | 7137 |
| 9 | 19018 |
| 10 | 50347 |
| 11 | 132716 |
| 12 | 348941 |
| 13 | 915950 |
| 14 | 2401911 |
| 15 | 6294640 |
| 16 | 16489889 |
| 17 | 43187778 |
| 18 | 113094099 |
| 19 | 296127940 |
| 20 | 775343821 |
| 21 | 2029991062 |
| 22 | 5314771031 |
| 23 | 13914551256 |
| 24 | 36429253657 |
| 25 | 95373809882 |
| 26 | 249693147107 |
| 27 | 653707202748 |
| 28 | 1711431003597 |
| 29 | 4480589921838 |