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) |
|---|---|
| 0 | 0 |
| 1 | -1 |
| 2 | 1 |
| 3 | -1 |
| 4 | 0 |
| 5 | 1 |
| 6 | -2 |
| 7 | 2 |
| 8 | -1 |
| 9 | -1 |
| 10 | 3 |
| 11 | -4 |
| 12 | 3 |
| 13 | 0 |
| 14 | -4 |
| 15 | 7 |
| 16 | -7 |
| 17 | 3 |
| 18 | 4 |
| 19 | -11 |
| 20 | 14 |
| 21 | -10 |
| 22 | -1 |
| 23 | 15 |
| 24 | -25 |
| 25 | 24 |
| 26 | -9 |
| 27 | -16 |
| 28 | 40 |
| 29 | -49 |
| 30 | 33 |
| 31 | 7 |
| 32 | -56 |
| 33 | 89 |
| 34 | -82 |
| 35 | 26 |
| 36 | 63 |
| 37 | -145 |
| 38 | 171 |
| 39 | -108 |
| 40 | -37 |
| 41 | 208 |
| 42 | -316 |
| 43 | 279 |
| 44 | -71 |
| 45 | -245 |
| 46 | 524 |
| 47 | -595 |
| 48 | 350 |
| 49 | 174 |
| 50 | -769 |
| 51 | 1119 |
| 52 | -945 |
| 53 | 176 |
| 54 | 943 |
| 55 | -1888 |
| 56 | 2064 |
| 57 | -1121 |
| 58 | -767 |
| 59 | 2831 |
| 60 | -3952 |