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 | 4 |
| 4 | -6 |
| 5 | 6 |
| 6 | -3 |
| 7 | 8 |
| 8 | -22 |
| 9 | 20 |
| 10 | 0 |
| 11 | 12 |
| 12 | -44 |
| 13 | 14 |
| 14 | 7 |
| 15 | 72 |
| 16 | -95 |
| 17 | 18 |
| 18 | -10 |
| 19 | 20 |
| 20 | -71 |
| 21 | 142 |
| 22 | 33 |
| 23 | 24 |
| 24 | -399 |
| 25 | 152 |
| 26 | 52 |
| 27 | 248 |
| 28 | -57 |
| 29 | 30 |
| 30 | -121 |
| 31 | 32 |
| 32 | -679 |
| 33 | 398 |
| 34 | 102 |
| 35 | 828 |
| 36 | -685 |
| 37 | 38 |
| 38 | 133 |
| 39 | 600 |
| 40 | -1568 |
| 41 | 42 |
| 42 | -140 |
| 43 | 44 |
| 44 | 318 |
| 45 | 2864 |
| 46 | 207 |
| 47 | 48 |
| 48 | -5858 |
| 49 | 1766 |
| 50 | -751 |
| 51 | 1192 |
| 52 | 831 |
| 53 | 54 |
| 54 | 348 |
| 55 | 4424 |
| 56 | -3979 |
| 57 | 1598 |
| 58 | 348 |
| 59 | 60 |