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) |
|---|---|
| 4 | 1 |
| 5 | -4 |
| 6 | 2 |
| 7 | 6 |
| 8 | -9 |
| 9 | 4 |
| 10 | -4 |
| 11 | 16 |
| 12 | -20 |
| 13 | 8 |
| 14 | 1 |
| 15 | -14 |
| 16 | 41 |
| 17 | -44 |
| 18 | 16 |
| 19 | 6 |
| 20 | -44 |
| 21 | 102 |
| 22 | -96 |
| 23 | 32 |
| 24 | -1 |
| 25 | 26 |
| 26 | -129 |
| 27 | 248 |
| 28 | -208 |
| 29 | 64 |
| 30 | -8 |
| 31 | 96 |
| 32 | -360 |
| 33 | 592 |
| 34 | -448 |
| 35 | 128 |
| 36 | 1 |
| 37 | -42 |
| 38 | 321 |
| 39 | -968 |
| 40 | 1392 |
| 41 | -960 |
| 42 | 256 |
| 43 | 10 |
| 44 | -180 |
| 45 | 1002 |
| 46 | -2528 |
| 47 | 3232 |
| 48 | -2048 |
| 49 | 512 |
| 50 | -1 |
| 51 | 62 |
| 52 | -681 |
| 53 | 2972 |
| 54 | -6448 |
| 55 | 7424 |
| 56 | -4352 |
| 57 | 1024 |