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) |
|---|---|
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 19 |
| 6 | 41 |
| 7 | 74 |
| 8 | 131 |
| 9 | 302 |
| 10 | 523 |
| 11 | 1031 |
| 12 | 2458 |
| 13 | 4132 |
| 14 | 8209 |
| 15 | 16381 |
| 16 | 32832 |
| 17 | 84614 |
| 18 | 131101 |
| 19 | 262139 |