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 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 5 |
| 8 | 9 |
| 9 | 21 |
| 10 | 44 |
| 11 | 107 |
| 12 | 247 |
| 13 | 607 |
| 14 | 1465 |
| 15 | 3649 |
| 16 | 9087 |
| 17 | 23059 |
| 18 | 58831 |
| 19 | 151832 |
| 20 | 394074 |
| 21 | 1030492 |
| 22 | 2708343 |
| 23 | 7157735 |
| 24 | 19002282 |
| 25 | 50676945 |
| 26 | 135691504 |
| 27 | 364725995 |
| 28 | 983775878 |
| 29 | 2662271414 |
| 30 | 7226368722 |
| 31 | 19670528467 |
| 32 | 53685042694 |
| 33 | 146879757368 |
| 34 | 402786655780 |
| 35 | 1106968400532 |