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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 13 |
| 7 | 70 |
| 8 | 608 |
| 9 | 7222 |
| 10 | 110132 |
| 11 | 2039273 |
| 12 | 44176717 |
| 13 | 1092493042 |
| 14 | 30322994747 |
| 15 | 932701249291 |