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 | 91 |
| 4 | 4831 |
| 5 | 39914491 |
| 6 | 6226990771 |
| 7 | 355687427585491 |
| 8 | 121645100399132311 |
| 9 | 25852016738884753547131 |
| 10 | 8841761993739701954537146306771 |
| 11 | 8222838654177922817725362319509871 |
| 12 | 13763753091226345046315979581573481661865191 |
| 13 | 33452526613163807108170062053440751360901736472791 |