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 | -19682 |
| 4 | 1 |
| 5 | 1953126 |
| 6 | -19682 |
| 7 | -40353606 |
| 8 | 1 |
| 9 | 387400807 |
| 10 | 1953126 |
| 11 | -2357947690 |
| 12 | -19682 |
| 13 | 10604499374 |
| 14 | -40353606 |
| 15 | -38441425932 |
| 16 | 1 |
| 17 | 118587876498 |
| 18 | 387400807 |
| 19 | -322687697778 |
| 20 | 1953126 |
| 21 | 794239673292 |
| 22 | -2357947690 |
| 23 | -1801152661462 |
| 24 | -19682 |
| 25 | 3814699218751 |