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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 17 |
| 5 | 82 |
| 6 | 489 |
| 7 | 2923 |
| 8 | 18401 |
| 9 | 116848 |
| 10 | 753726 |
| 11 | 4898579 |
| 12 | 32085696 |
| 13 | 211398614 |
| 14 | 1400292492 |
| 15 | 9318028028 |
| 16 | 62259251309 |
| 17 | 417496576187 |