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 | 12 |
| 2 | 174 |
| 3 | 3084 |
| 4 | 35971776 |
| 5 | 2752830231727104 |
| 6 | 9068533325994694179911466663936 |
| 7 | 55357290942669201825421134704769198540735968154850291354435584 |