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 | 1 |
| 2 | 0 |
| 3 | -2 |
| 4 | 1 |
| 5 | 3 |
| 6 | -2 |
| 7 | -4 |
| 8 | 1 |
| 9 | 6 |
| 10 | 0 |
| 11 | -8 |
| 12 | 2 |
| 13 | 8 |
| 14 | -4 |
| 15 | -10 |
| 16 | 3 |
| 17 | 15 |
| 18 | -2 |
| 19 | -16 |
| 20 | 4 |
| 21 | 16 |
| 22 | -8 |
| 23 | -22 |
| 24 | 7 |
| 25 | 28 |
| 26 | -2 |
| 27 | -30 |
| 28 | 7 |
| 29 | 33 |
| 30 | -14 |
| 31 | -40 |
| 32 | 9 |
| 33 | 48 |
| 34 | -8 |
| 35 | -54 |
| 36 | 16 |
| 37 | 60 |
| 38 | -20 |
| 39 | -68 |
| 40 | 19 |
| 41 | 82 |
| 42 | -16 |
| 43 | -94 |
| 44 | 21 |
| 45 | 98 |
| 46 | -34 |
| 47 | -116 |
| 48 | 32 |
| 49 | 138 |
| 50 | -24 |
| 51 | -146 |
| 52 | 40 |
| 53 | 165 |
| 54 | -54 |
| 55 | -190 |
| 56 | 45 |
| 57 | 212 |
| 58 | -46 |
| 59 | -240 |