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 | 0 |
| 5 | 6 |
| 6 | 3 |
| 7 | 8 |
| 8 | -8 |
| 9 | 20 |
| 10 | 0 |
| 11 | 12 |
| 12 | -12 |
| 13 | 14 |
| 14 | -7 |
| 15 | 72 |
| 16 | -65 |
| 17 | 18 |
| 18 | 10 |
| 19 | 20 |
| 20 | -61 |
| 21 | 142 |
| 22 | -33 |
| 23 | 24 |
| 24 | -203 |
| 25 | 152 |
| 26 | -52 |
| 27 | 248 |
| 28 | -183 |
| 29 | 30 |
| 30 | 121 |
| 31 | 32 |
| 32 | -617 |
| 33 | 398 |
| 34 | -102 |
| 35 | 828 |
| 36 | -619 |
| 37 | 38 |
| 38 | -133 |
| 39 | 600 |
| 40 | -896 |
| 41 | 42 |
| 42 | 140 |
| 43 | 44 |
| 44 | -870 |
| 45 | 2864 |
| 46 | -207 |
| 47 | 48 |
| 48 | -4438 |
| 49 | 1766 |
| 50 | 751 |
| 51 | 1192 |
| 52 | -1587 |
| 53 | 54 |
| 54 | -348 |
| 55 | 4424 |
| 56 | -3011 |
| 57 | 1598 |
| 58 | -348 |
| 59 | 60 |