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 | 3 |
| 2 | 7 |
| 3 | 121 |
| 4 | 5041 |
| 5 | 39916801 |
| 6 | 6227020801 |
| 7 | 355687428096001 |
| 8 | 121645100408832001 |
| 9 | 25852016738884976640001 |
| 10 | 8841761993739701954543616000001 |
| 11 | 8222838654177922817725562880000001 |
| 12 | 13763753091226345046315979581580902400000001 |
| 13 | 33452526613163807108170062053440751665152000000001 |