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 | 2 |
| 3 | 5 |
| 4 | 15 |
| 5 | 49 |
| 6 | 180 |
| 7 | 715 |
| 8 | 3081 |
| 9 | 14217 |
| 10 | 69905 |
| 11 | 363926 |
| 12 | 1996922 |
| 13 | 1150036 |
| 14 | 69269925 |