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) |
|---|---|
| 6 | 1 |
| 7 | 1 |
| 8 | 5 |
| 9 | 18 |
| 10 | 63 |
| 11 | 206 |
| 12 | 671 |
| 13 | 2087 |
| 14 | 6434 |
| 15 | 19472 |
| 16 | 58375 |
| 17 | 173316 |
| 18 | 511452 |
| 19 | 1500697 |
| 20 | 4386021 |
| 21 | 12775455 |
| 22 | 37118209 |
| 23 | 107621858 |
| 24 | 311552351 |
| 25 | 900775893 |
| 26 | 2601887149 |
| 27 | 7510011727 |
| 28 | 21664873773 |
| 29 | 62473966631 |
| 30 | 180104101037 |
| 31 | 519126161517 |
| 32 | 1496177366884 |
| 33 | 4312044894059 |
| 34 | 12427896986697 |