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 | 9 |
| 4 | 176 |
| 5 | 155 |
| 6 | 2450 |
| 7 | 21500 |
| 8 | 118993 |
| 9 | 767700 |
| 10 | 12409639 |
| 11 | 56024339 |
| 12 | 857777653 |
| 13 | 8648737607 |