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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | -1 |
| 7 | 1 |
| 8 | -1 |
| 9 | -2 |
| 10 | -5 |
| 11 | 1 |
| 12 | -8 |
| 13 | 1 |
| 14 | -9 |
| 15 | -13 |
| 16 | -9 |
| 17 | 1 |
| 18 | -16 |
| 19 | 1 |
| 20 | -22 |
| 21 | -21 |
| 22 | -17 |
| 23 | 1 |
| 24 | -28 |
| 25 | -14 |
| 26 | -21 |
| 27 | -20 |
| 28 | -36 |
| 29 | 1 |
| 30 | -43 |
| 31 | 1 |
| 32 | -31 |
| 33 | -37 |
| 34 | -29 |
| 35 | -45 |
| 36 | -49 |
| 37 | 1 |
| 38 | -33 |
| 39 | -45 |
| 40 | -62 |
| 41 | 1 |
| 42 | -67 |
| 43 | 1 |
| 44 | -64 |
| 45 | -64 |
| 46 | -41 |
| 47 | 1 |
| 48 | -69 |
| 49 | -34 |
| 50 | -64 |
| 51 | -61 |
| 52 | -78 |
| 53 | 1 |
| 54 | -68 |
| 55 | -77 |
| 56 | -96 |
| 57 | -69 |
| 58 | -53 |
| 59 | 1 |
| 60 | -88 |
| 61 | 1 |
| 62 | -57 |
| 63 | -96 |
| 64 | -79 |
| 65 | -93 |
| 66 | -115 |
| 67 | 1 |
| 68 | -106 |
| 69 | -85 |
| 70 | -123 |
| 71 | 1 |
| 72 | -95 |
| 73 | 1 |
| 74 | -69 |