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 | 2 |
| 4 | 10 |
| 5 | 49 |
| 6 | 268 |
| 7 | 1505 |
| 8 | 9667 |
| 9 | 81891 |
| 10 | 779193 |
| 11 | 7726623 |
| 12 | 80770479 |
| 13 | 921442854 |
| 14 | 11621384700 |
| 15 | 159894957124 |