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 | -3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 6 |
| 7 | -16 |
| 8 | -8 |
| 9 | 9 |
| 10 | -12 |
| 11 | 12 |
| 12 | -12 |
| 13 | 38 |
| 14 | 32 |
| 15 | -18 |
| 16 | 16 |
| 17 | -126 |
| 18 | -18 |
| 19 | 20 |
| 20 | 24 |
| 21 | 48 |
| 22 | -24 |
| 23 | 168 |
| 24 | 24 |
| 25 | -89 |
| 26 | -76 |
| 27 | -27 |
| 28 | -64 |
| 29 | 30 |
| 30 | 36 |
| 31 | -88 |
| 32 | -32 |
| 33 | -36 |
| 34 | 252 |
| 35 | -96 |
| 36 | 36 |
| 37 | 254 |
| 38 | -40 |
| 39 | -114 |
| 40 | -48 |
| 41 | 42 |
| 42 | -96 |
| 43 | -52 |
| 44 | 48 |
| 45 | 54 |
| 46 | -336 |
| 47 | -96 |
| 48 | -48 |
| 49 | -87 |
| 50 | 178 |
| 51 | 378 |
| 52 | 152 |
| 53 | 198 |
| 54 | 54 |
| 55 | 72 |
| 56 | 128 |