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 | -1 |
| 3 | 0 |
| 4 | -1 |
| 5 | 2 |
| 6 | 0 |
| 7 | 2 |
| 8 | -2 |
| 9 | 1 |
| 10 | 4 |
| 11 | -1 |
| 12 | -4 |
| 13 | 0 |
| 14 | 4 |
| 15 | -8 |
| 16 | -3 |
| 17 | 0 |
| 18 | 0 |
| 19 | -2 |
| 20 | 17 |
| 21 | -8 |
| 22 | -2 |
| 23 | -11 |
| 24 | 4 |
| 25 | 7 |
| 26 | 0 |
| 27 | 22 |
| 28 | 26 |
| 29 | -30 |
| 30 | -32 |
| 31 | 30 |
| 32 | -18 |
| 33 | 57 |
| 34 | -58 |
| 35 | 28 |
| 36 | -12 |
| 37 | -28 |
| 38 | -41 |
| 39 | 97 |
| 40 | -11 |
| 41 | -36 |
| 42 | 8 |
| 43 | -95 |
| 44 | -5 |
| 45 | -69 |
| 46 | -29 |
| 47 | 104 |
| 48 | 76 |
| 49 | 14 |
| 50 | 209 |
| 51 | -145 |
| 52 | 29 |
| 53 | 46 |
| 54 | 371 |
| 55 | -437 |
| 56 | 0 |
| 57 | -336 |
| 58 | 116 |
| 59 | -94 |
| 60 | -388 |
| 61 | 952 |
| 62 | 449 |
| 63 | -665 |