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 | 5 |
| 5 | 10 |
| 6 | 24 |
| 7 | 52 |
| 8 | 124 |
| 9 | 282 |
| 10 | 668 |
| 11 | 1548 |
| 12 | 3654 |
| 13 | 8533 |
| 14 | 20093 |
| 15 | 47033 |
| 16 | 110533 |
| 17 | 258807 |
| 18 | 607227 |
| 19 | 1421055 |
| 20 | 3329585 |
| 21 | 7785995 |
| 22 | 18221563 |
| 23 | 42575336 |
| 24 | 99539106 |
| 25 | 232398659 |
| 26 | 542864111 |
| 27 | 1266567155 |
| 28 | 2956342341 |
| 29 | 6893180336 |
| 30 | 16078817198 |
| 31 | 37469245219 |
| 32 | 87347384305 |
| 33 | 203447081205 |