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 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | -1 |
| 5 | 1 |
| 6 | -1 |
| 7 | 1 |
| 8 | -3 |
| 9 | 4 |
| 10 | -4 |
| 11 | 1 |
| 12 | 0 |
| 13 | 1 |
| 14 | -6 |
| 15 | 11 |
| 16 | -11 |
| 17 | 1 |
| 18 | 7 |
| 19 | 1 |
| 20 | -18 |
| 21 | 22 |
| 22 | -10 |
| 23 | 1 |
| 24 | -3 |
| 25 | 6 |
| 26 | -12 |
| 27 | 37 |
| 28 | -48 |
| 29 | 1 |
| 30 | 45 |
| 31 | 1 |
| 32 | -71 |
| 33 | 56 |
| 34 | -16 |
| 35 | 36 |
| 36 | -41 |
| 37 | 1 |
| 38 | -18 |
| 39 | 79 |
| 40 | -69 |
| 41 | 1 |
| 42 | 51 |
| 43 | 1 |
| 44 | -186 |
| 45 | 232 |
| 46 | -22 |
| 47 | 1 |
| 48 | -179 |
| 49 | 8 |
| 50 | 186 |
| 51 | 137 |
| 52 | -311 |
| 53 | 1 |
| 54 | 1 |
| 55 | 331 |
| 56 | -364 |
| 57 | 172 |
| 58 | -28 |
| 59 | 1 |
| 60 | -51 |
| 61 | 1 |
| 62 | -30 |
| 63 | 295 |
| 64 | -599 |
| 65 | 716 |
| 66 | -263 |
| 67 | 1 |
| 68 | -713 |
| 69 | 254 |
| 70 | 1177 |
| 71 | 1 |