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 | 2 |
| 3 | 3 |
| 4 | -4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | -16 |
| 9 | 18 |
| 10 | -10 |
| 11 | 11 |
| 12 | -12 |
| 13 | 13 |
| 14 | -14 |
| 15 | 15 |
| 16 | -16 |
| 17 | 17 |
| 18 | -18 |
| 19 | 19 |
| 20 | 20 |
| 21 | -42 |
| 22 | 44 |
| 23 | 23 |
| 24 | -24 |
| 25 | 25 |
| 26 | -52 |
| 27 | 54 |
| 28 | -56 |
| 29 | 58 |
| 30 | -60 |
| 31 | 62 |
| 32 | -64 |
| 33 | 66 |
| 34 | 34 |
| 35 | -70 |
| 36 | 72 |
| 37 | -74 |
| 38 | 76 |
| 39 | -78 |
| 40 | 80 |
| 41 | -82 |
| 42 | 84 |
| 43 | -86 |
| 44 | 88 |
| 45 | -90 |
| 46 | 92 |
| 47 | -94 |
| 48 | 96 |
| 49 | -98 |
| 50 | 100 |
| 51 | -102 |
| 52 | 104 |
| 53 | -53 |
| 54 | 54 |
| 55 | 55 |
| 56 | 56 |
| 57 | -171 |
| 58 | -58 |
| 59 | 177 |
| 60 | 60 |
| 61 | -183 |
| 62 | 62 |
| 63 | -63 |
| 64 | 128 |
| 65 | -130 |
| 66 | 132 |
| 67 | -134 |
| 68 | 136 |
| 69 | -138 |
| 70 | 140 |
| 71 | -142 |