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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 65 |
| 4 | 1725 |
| 5 | 81225 |
| 6 | 6181125 |
| 7 | 710984625 |
| 8 | 117537778125 |
| 9 | 26848583825625 |
| 10 | 8210318193703125 |
| 11 | 3275053250628290625 |
| 12 | 1667519951972905828125 |
| 13 | 1063947235962694359515625 |
| 14 | 837322677987349287566953125 |
| 15 | 801714108831393845941434140625 |