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 | -8 |
| 4 | -1 |
| 5 | 26 |
| 6 | 8 |
| 7 | -48 |
| 8 | -1 |
| 9 | 73 |
| 10 | -26 |
| 11 | -120 |
| 12 | 8 |
| 13 | 170 |
| 14 | 48 |
| 15 | -208 |
| 16 | -1 |
| 17 | 290 |
| 18 | -73 |
| 19 | -360 |
| 20 | -26 |
| 21 | 384 |
| 22 | 120 |
| 23 | -528 |
| 24 | 8 |
| 25 | 651 |
| 26 | -170 |
| 27 | -656 |
| 28 | 48 |
| 29 | 842 |
| 30 | 208 |
| 31 | -960 |
| 32 | -1 |
| 33 | 960 |
| 34 | -290 |
| 35 | -1248 |
| 36 | -73 |
| 37 | 1370 |
| 38 | 360 |
| 39 | -1360 |
| 40 | -26 |
| 41 | 1682 |
| 42 | -384 |
| 43 | -1848 |
| 44 | 120 |
| 45 | 1898 |
| 46 | 528 |
| 47 | -2208 |
| 48 | 8 |
| 49 | 2353 |
| 50 | -651 |
| 51 | -2320 |