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 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 10 |
| 8 | 20 |
| 9 | 38 |
| 10 | 73 |
| 11 | 141 |
| 12 | 272 |
| 13 | 524 |
| 14 | 1010 |
| 15 | 1947 |
| 16 | 3753 |
| 17 | 7234 |
| 18 | 13944 |
| 19 | 26878 |
| 20 | 51809 |
| 21 | 99865 |
| 22 | 192496 |
| 23 | 371048 |
| 24 | 715218 |
| 25 | 1378627 |
| 26 | 2657389 |
| 27 | 5122282 |
| 28 | 9873516 |
| 29 | 19031814 |
| 30 | 36685001 |
| 31 | 70712613 |
| 32 | 136302944 |
| 33 | 262732372 |
| 34 | 506432930 |
| 35 | 976180859 |