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 | 1 |
| 3 | 1 |
| 4 | -2 |
| 5 | 1 |
| 6 | -2 |
| 7 | 3 |
| 8 | -3 |
| 9 | 1 |
| 10 | 4 |
| 11 | -5 |
| 12 | 6 |
| 13 | -4 |
| 14 | 1 |
| 15 | -7 |
| 16 | 9 |
| 17 | -11 |
| 18 | 10 |
| 19 | -5 |
| 20 | 1 |
| 21 | 11 |
| 22 | -16 |
| 23 | 20 |
| 24 | -21 |
| 25 | 15 |
| 26 | -6 |
| 27 | 1 |
| 28 | -16 |
| 29 | 27 |
| 30 | -36 |
| 31 | 41 |
| 32 | -36 |
| 33 | 21 |
| 34 | -7 |
| 35 | 1 |
| 36 | 22 |
| 37 | -43 |
| 38 | 63 |
| 39 | -77 |
| 40 | 77 |
| 41 | -57 |
| 42 | 28 |
| 43 | -8 |
| 44 | 1 |
| 45 | -29 |
| 46 | 65 |
| 47 | -106 |
| 48 | 140 |
| 49 | -154 |
| 50 | 134 |
| 51 | -85 |
| 52 | 36 |
| 53 | -9 |
| 54 | 1 |
| 55 | 37 |
| 56 | -94 |
| 57 | 171 |
| 58 | -246 |
| 59 | 294 |
| 60 | -288 |
| 61 | 219 |
| 62 | -121 |
| 63 | 45 |
| 64 | -10 |
| 65 | 1 |
| 66 | -46 |
| 67 | 131 |
| 68 | -265 |
| 69 | 417 |
| 70 | -540 |
| 71 | 582 |
| 72 | -507 |
| 73 | 340 |
| 74 | -166 |
| 75 | 55 |
| 76 | -11 |
| 77 | 1 |