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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 4 |
| 8 | 11 |
| 9 | 35 |
| 10 | 101 |
| 11 | 290 |
| 12 | 804 |
| 13 | 2256 |
| 14 | 6296 |
| 15 | 17689 |
| 16 | 49952 |
| 17 | 142016 |
| 18 | 406330 |
| 19 | 1170272 |
| 20 | 3390932 |
| 21 | 9882412 |
| 22 | 28955403 |
| 23 | 85261439 |
| 24 | 252213192 |
| 25 | 749250700 |
| 26 | 2234562027 |
| 27 | 6688670232 |
| 28 | 20088920730 |
| 29 | 60525912003 |
| 30 | 182895125096 |
| 31 | 554186425193 |
| 32 | 1683554604984 |
| 33 | 5126814324715 |
| 34 | 15647846830627 |
| 35 | 47862034920652 |
| 36 | 146691540312878 |