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 | -3 |
| 3 | 0 |
| 4 | 4 |
| 5 | -9 |
| 6 | -3 |
| 7 | -4 |
| 8 | 4 |
| 9 | 13 |
| 10 | 23 |
| 11 | -34 |
| 12 | -22 |
| 13 | 9 |
| 14 | 23 |
| 15 | 38 |
| 16 | 54 |
| 17 | -71 |
| 18 | -53 |
| 19 | 34 |
| 20 | 54 |
| 21 | 75 |
| 22 | 97 |
| 23 | -120 |
| 24 | -96 |
| 25 | -71 |
| 26 | -45 |
| 27 | -18 |
| 28 | 10 |
| 29 | -39 |
| 30 | -9 |
| 31 | -22 |
| 32 | 10 |
| 33 | 43 |
| 34 | 77 |
| 35 | 112 |
| 36 | 148 |
| 37 | -185 |
| 38 | -147 |
| 39 | -108 |
| 40 | -68 |
| 41 | 27 |
| 42 | 69 |
| 43 | -112 |
| 44 | -68 |
| 45 | -23 |
| 46 | 23 |
| 47 | -70 |
| 48 | -22 |
| 49 | 27 |
| 50 | 77 |
| 51 | 128 |
| 52 | 180 |
| 53 | -233 |
| 54 | -179 |
| 55 | -124 |
| 56 | -68 |
| 57 | -11 |