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 | 7 |
| 3 | -6 |
| 4 | 49 |
| 5 | -63 |
| 6 | 15 |
| 7 | 343 |
| 8 | -588 |
| 9 | 140 |
| 10 | 126 |
| 11 | -20 |
| 12 | 2401 |
| 13 | -5145 |
| 14 | 1225 |
| 15 | 2205 |
| 16 | -175 |
| 17 | -525 |
| 18 | 15 |
| 19 | 16807 |
| 20 | -43218 |
| 21 | 10290 |
| 22 | 27783 |
| 23 | -1470 |
| 24 | -8820 |
| 25 | 126 |
| 26 | -2646 |
| 27 | 630 |
| 28 | 525 |
| 29 | -6 |
| 30 | 117649 |
| 31 | -352947 |
| 32 | 84035 |
| 33 | 302526 |
| 34 | -12005 |
| 35 | -108045 |
| 36 | 1029 |
| 37 | -64827 |
| 38 | 10290 |
| 39 | 8575 |
| 40 | -49 |
| 41 | 15435 |
| 42 | -441 |
| 43 | -1225 |
| 44 | 1 |