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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 14 |
| 6 | 42 |
| 7 | 150 |
| 8 | 624 |
| 9 | 2947 |
| 10 | 15079 |
| 11 | 82607 |
| 12 | 474030 |
| 13 | 2816952 |
| 14 | 17194524 |
| 15 | 107226255 |