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 | 5 |
| 2 | 16 |
| 3 | 68 |
| 4 | 315 |
| 5 | 1653 |
| 6 | 9126 |
| 7 | 50166 |
| 8 | 266060 |
| 9 | 1445197 |
| 10 | 8388620 |
| 11 | 49943639 |
| 12 | 291356973 |
| 13 | 1672450652 |
| 14 | 9817427902 |
| 15 | 60070829938 |
| 16 | 373040809711 |
| 17 | 2261787393319 |