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) |
|---|---|
| 8 | 1 |
| 9 | 1 |
| 10 | 3 |
| 11 | 6 |
| 12 | 13 |
| 13 | 26 |
| 14 | 56 |
| 15 | 115 |
| 16 | 247 |
| 17 | 532 |
| 18 | 1172 |
| 19 | 2627 |
| 20 | 6017 |
| 21 | 14020 |
| 22 | 33263 |
| 23 | 80196 |
| 24 | 196133 |
| 25 | 485993 |
| 26 | 1218103 |
| 27 | 3084686 |
| 28 | 7882748 |
| 29 | 20309036 |
| 30 | 52704689 |
| 31 | 137675229 |
| 32 | 361761187 |
| 33 | 955688561 |
| 34 | 2537043121 |
| 35 | 6765174365 |
| 36 | 18113821981 |
| 37 | 48683671360 |
| 38 | 131303094976 |
| 39 | 355284353448 |