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 | 2 |
| 1 | 5 |
| 2 | 14 |
| 3 | 32 |
| 4 | 71 |
| 5 | 149 |
| 6 | 304 |
| 7 | 604 |
| 8 | 1177 |
| 9 | 2256 |
| 10 | 4266 |
| 11 | 7974 |
| 12 | 14758 |
| 13 | 27079 |
| 14 | 49312 |
| 15 | 89200 |
| 16 | 160393 |
| 17 | 286867 |
| 18 | 510596 |
| 19 | 904838 |
| 20 | 1597091 |
| 21 | 2808672 |
| 22 | 4922820 |
| 23 | 8601660 |
| 24 | 14986730 |
| 25 | 26042201 |
| 26 | 45141410 |
| 27 | 78067712 |
| 28 | 134719931 |
| 29 | 232014593 |
| 30 | 398818552 |
| 31 | 684322432 |