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 | 3 |
| 2 | 6 |
| 3 | 37 |
| 4 | 195 |
| 5 | 1467 |
| 6 | 3408 |
| 7 | 17113 |
| 8 | 40435 |
| 9 | 109638 |
| 10 | 191718 |
| 11 | 572939 |
| 12 | 842487 |
| 13 | 2139708 |
| 14 | 3231583 |
| 15 | 5261013 |