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 | -3 |
| 3 | -5 |
| 4 | 0 |
| 5 | -7 |
| 6 | 15 |
| 7 | -11 |
| 8 | 6 |
| 9 | 0 |
| 10 | 15 |
| 11 | -13 |
| 12 | 12 |
| 13 | -17 |
| 14 | 27 |
| 15 | 35 |
| 16 | 0 |
| 17 | -19 |
| 18 | 24 |
| 19 | -23 |
| 20 | 42 |
| 21 | 55 |
| 22 | 15 |
| 23 | -29 |
| 24 | -66 |
| 25 | 0 |
| 26 | 27 |
| 27 | 60 |
| 28 | 54 |
| 29 | -31 |
| 30 | -27 |
| 31 | -37 |
| 32 | -12 |
| 33 | 45 |
| 34 | 15 |
| 35 | 77 |
| 36 | -144 |
| 37 | -41 |
| 38 | 27 |
| 39 | 75 |
| 40 | -102 |
| 41 | -43 |
| 42 | -63 |
| 43 | -47 |
| 44 | 132 |
| 45 | 60 |
| 46 | 39 |
| 47 | -53 |
| 48 | -24 |
| 49 | 0 |
| 50 | 84 |
| 51 | 65 |
| 52 | 144 |
| 53 | -59 |
| 54 | -384 |
| 55 | 91 |
| 56 | -162 |
| 57 | 85 |
| 58 | 15 |
| 59 | -61 |
| 60 | -558 |
| 61 | -67 |
| 62 | 39 |
| 63 | 120 |
| 64 | 0 |
| 65 | 119 |
| 66 | 165 |
| 67 | -71 |
| 68 | 222 |
| 69 | 115 |
| 70 | 9 |
| 71 | -73 |
| 72 | 168 |