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 | 0 |
| 1 | 1 |
| 2 | -1 |
| 3 | 3 |
| 4 | -8 |
| 5 | 125 |
| 6 | -54 |
| 7 | 16807 |
| 8 | -16384 |
| 9 | 531441 |
| 10 | -156250 |
| 11 | 2357947691 |
| 12 | -2985984 |
| 13 | 1792160394037 |
| 14 | -7909306972 |
| 15 | 320361328125 |
| 16 | -35184372088832 |
| 17 | 2862423051509815793 |
| 18 | -5083731656658 |
| 19 | 5480386857784802185939 |
| 20 | -32000000000000000 |
| 21 | 41209797661291758429 |
| 22 | -244636361793658185164 |