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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 4 |
| 6 | 14 |
| 7 | 36 |
| 8 | 88 |
| 9 | 199 |
| 10 | 432 |
| 11 | 914 |
| 12 | 1900 |
| 13 | 3896 |
| 14 | 7926 |
| 15 | 16036 |
| 16 | 32311 |
| 17 | 64944 |
| 18 | 130308 |
| 19 | 261166 |
| 20 | 523040 |
| 21 | 1046996 |
| 22 | 2095152 |
| 23 | 4191796 |
| 24 | 8385466 |
| 25 | 16773303 |
| 26 | 33549564 |
| 27 | 67102848 |
| 28 | 134210298 |
| 29 | 268426328 |
| 30 | 536859712 |
| 31 | 1073728142 |
| 32 | 2147466956 |
| 33 | 4294947014 |
| 34 | 8589909976 |