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) |
|---|---|
| 0 | 1 |
| 1 | -2 |
| 2 | 1 |
| 3 | 2 |
| 4 | -3 |
| 5 | 1 |
| 6 | 0 |
| 7 | 2 |
| 8 | -3 |
| 9 | 1 |
| 10 | 0 |
| 11 | 2 |
| 12 | -1 |
| 13 | -2 |
| 14 | 1 |
| 15 | 0 |
| 16 | 4 |
| 17 | 0 |
| 18 | -5 |
| 19 | 0 |
| 20 | 1 |
| 21 | 0 |
| 22 | 12 |
| 23 | 4 |
| 24 | -15 |
| 25 | -5 |
| 26 | 3 |
| 27 | 1 |
| 28 | 0 |
| 29 | 48 |
| 30 | 28 |
| 31 | -56 |
| 32 | -35 |
| 33 | 7 |
| 34 | 7 |
| 35 | 1 |
| 36 | 0 |
| 37 | 240 |
| 38 | 188 |
| 39 | -252 |
| 40 | -231 |
| 41 | 0 |
| 42 | 42 |
| 43 | 12 |
| 44 | 1 |
| 45 | 0 |
| 46 | 1440 |
| 47 | 1368 |
| 48 | -1324 |
| 49 | -1638 |
| 50 | -231 |
| 51 | 252 |
| 52 | 114 |
| 53 | 18 |
| 54 | 1 |
| 55 | 0 |
| 56 | 10080 |
| 57 | 11016 |
| 58 | -7900 |
| 59 | -12790 |
| 60 | -3255 |
| 61 | 1533 |
| 62 | 1050 |
| 63 | 240 |
| 64 | 25 |
| 65 | 1 |