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 | 0 |
| 3 | -1 |
| 4 | 3 |
| 5 | -7 |
| 6 | 7 |
| 7 | -2 |
| 8 | -6 |
| 9 | 9 |
| 10 | 10 |
| 11 | -5 |
| 12 | -15 |
| 13 | -14 |
| 14 | -2 |
| 15 | 55 |
| 16 | 10 |
| 17 | -17 |
| 18 | -41 |
| 19 | -15 |
| 20 | -36 |
| 21 | 42 |
| 22 | 18 |
| 23 | -13 |
| 24 | 44 |
| 25 | 81 |
| 26 | 29 |
| 27 | -35 |
| 28 | -45 |
| 29 | -18 |
| 30 | -180 |
| 31 | -29 |
| 32 | -23 |
| 33 | 41 |
| 34 | 53 |
| 35 | 135 |
| 36 | 99 |
| 37 | -48 |
| 38 | 51 |
| 39 | 114 |
| 40 | 131 |
| 41 | -30 |
| 42 | -140 |
| 43 | -58 |
| 44 | -53 |
| 45 | -303 |
| 46 | 34 |
| 47 | -37 |
| 48 | -120 |
| 49 | 34 |
| 50 | -196 |
| 51 | 147 |
| 52 | -87 |
| 53 | -45 |
| 54 | 226 |
| 55 | 207 |
| 56 | 166 |
| 57 | 103 |
| 58 | 67 |
| 59 | -41 |
| 60 | 466 |
| 61 | -84 |
| 62 | 91 |
| 63 | -288 |
| 64 | 13 |
| 65 | 350 |
| 66 | -258 |
| 67 | -91 |
| 68 | -108 |