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) |
|---|---|
| 3 | 0 |
| 4 | 7 |
| 5 | 204 |
| 6 | 1891 |
| 7 | 10846 |
| 8 | 46068 |
| 9 | 159830 |
| 10 | 477033 |
| 11 | 1268614 |
| 12 | 3075291 |
| 13 | 6911894 |
| 14 | 14580293 |
| 15 | 29145928 |
| 16 | 55620816 |
| 17 | 101945063 |
| 18 | 180327134 |
| 19 | 309087474 |