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 | 51 |
| 2 | 130 |
| 3 | 370 |
| 4 | 8201 |
| 5 | 73270 |
| 6 | 82080 |
| 7 | 26113610 |
| 8 | 4854248220 |
| 9 | 37682961610 |