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) |
|---|---|
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 4 |
| 7 | 8 |
| 8 | 17 |
| 9 | 37 |
| 10 | 81 |
| 11 | 177 |
| 12 | 389 |
| 13 | 859 |
| 14 | 1905 |
| 15 | 4241 |
| 16 | 9477 |
| 17 | 21251 |
| 18 | 47806 |
| 19 | 107864 |
| 20 | 244045 |
| 21 | 553575 |
| 22 | 1258687 |
| 23 | 2868285 |
| 24 | 6549757 |
| 25 | 14985361 |
| 26 | 34347444 |
| 27 | 78860152 |
| 28 | 181347591 |
| 29 | 417653187 |
| 30 | 963234195 |
| 31 | 2224464087 |
| 32 | 5143567237 |
| 33 | 11907471643 |
| 34 | 27597112946 |
| 35 | 64028244032 |
| 36 | 148703128913 |
| 37 | 345690623119 |