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 | 3 |
| 7 | 26 |
| 8 | 198 |
| 9 | 1095 |
| 10 | 5259 |
| 11 | 22678 |
| 12 | 91887 |
| 13 | 354442 |
| 14 | 1320089 |
| 15 | 4780355 |
| 16 | 16943165 |
| 17 | 59007970 |
| 18 | 202599228 |
| 19 | 687342673 |
| 20 | 2308586154 |
| 21 | 7687335917 |
| 22 | 25407923029 |
| 23 | 83430814454 |
| 24 | 272382655862 |
| 25 | 884706011664 |
| 26 | 2860304423466 |
| 27 | 9208948000393 |