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 | 1 |
| 4 | -2 |
| 5 | 1 |
| 6 | 1 |
| 7 | -4 |
| 8 | 4 |
| 9 | -1 |
| 10 | 1 |
| 11 | -7 |
| 12 | 13 |
| 13 | -7 |
| 14 | 1 |
| 15 | 1 |
| 16 | -11 |
| 17 | 35 |
| 18 | -31 |
| 19 | 10 |
| 20 | -1 |
| 21 | 1 |
| 22 | -16 |
| 23 | 74 |
| 24 | -107 |
| 25 | 61 |
| 26 | -14 |
| 27 | 1 |
| 28 | 1 |
| 29 | -22 |
| 30 | 147 |
| 31 | -308 |
| 32 | 275 |
| 33 | -111 |
| 34 | 19 |
| 35 | -1 |
| 36 | 1 |
| 37 | -29 |
| 38 | 256 |
| 39 | -763 |
| 40 | 1001 |
| 41 | -629 |
| 42 | 186 |
| 43 | -24 |
| 44 | 1 |
| 45 | 1 |
| 46 | -37 |
| 47 | 428 |
| 48 | -1683 |
| 49 | 3013 |
| 50 | -2721 |
| 51 | 1264 |
| 52 | -291 |
| 53 | 30 |
| 54 | -1 |
| 55 | 1 |
| 56 | -46 |