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 | 2 |
| 3 | 9 |
| 4 | 125 |
| 5 | 625 |
| 6 | 3125 |
| 7 | 15625 |
| 8 | 78125 |
| 9 | 9921875 |
| 10 | 1260078125 |
| 11 | 25937424601 |
| 12 | 285311670611 |
| 13 | 145223640340999 |
| 14 | 21557022777501157 |
| 15 | 799006685782884121 |
| 16 | 15181127029874798299 |
| 17 | 288441413567621167681 |
| 18 | 5480386857784802185939 |