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 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | -1 |
| 7 | 0 |
| 8 | 1 |
| 9 | 0 |
| 10 | -1 |
| 11 | 1 |
| 12 | 1 |
| 13 | -2 |
| 14 | -1 |
| 15 | 2 |
| 16 | 0 |
| 17 | -2 |
| 18 | 2 |
| 19 | 3 |
| 20 | -3 |
| 21 | -3 |
| 22 | 4 |
| 23 | 0 |
| 24 | -7 |
| 25 | 3 |
| 26 | 9 |
| 27 | -5 |
| 28 | -7 |
| 29 | 10 |
| 30 | 4 |
| 31 | -17 |
| 32 | -1 |
| 33 | 21 |
| 34 | -7 |
| 35 | -21 |
| 36 | 21 |
| 37 | 19 |
| 38 | -36 |
| 39 | -13 |
| 40 | 47 |
| 41 | -5 |
| 42 | -56 |
| 43 | 36 |
| 44 | 64 |
| 45 | -69 |
| 46 | -54 |
| 47 | 104 |
| 48 | 15 |
| 49 | -147 |
| 50 | 41 |
| 51 | 177 |
| 52 | -115 |
| 53 | -168 |
| 54 | 221 |
| 55 | 116 |
| 56 | -344 |
| 57 | -15 |
| 58 | 442 |
| 59 | -159 |
| 60 | -481 |
| 61 | 422 |
| 62 | 443 |
| 63 | -736 |
| 64 | -280 |
| 65 | 1034 |
| 66 | -90 |
| 67 | -1276 |
| 68 | 681 |