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 | 1 |
| 4 | -1 |
| 5 | -2 |
| 6 | 1 |
| 7 | -1 |
| 8 | -4 |
| 9 | -1 |
| 10 | 1 |
| 11 | -1 |
| 12 | -8 |
| 13 | -5 |
| 14 | 0 |
| 15 | 1 |
| 16 | -1 |
| 17 | -16 |
| 18 | -19 |
| 19 | -3 |
| 20 | 4 |
| 21 | 1 |
| 22 | -1 |
| 23 | -32 |
| 24 | -65 |
| 25 | -21 |
| 26 | 23 |
| 27 | 4 |
| 28 | 1 |
| 29 | -1 |
| 30 | -64 |
| 31 | -211 |
| 32 | -111 |
| 33 | 139 |
| 34 | 44 |
| 35 | 7 |
| 36 | 1 |
| 37 | -1 |
| 38 | -128 |
| 39 | -665 |
| 40 | -525 |
| 41 | 863 |
| 42 | 448 |
| 43 | 104 |
| 44 | 3 |
| 45 | 1 |
| 46 | -1 |
| 47 | -256 |
| 48 | -2059 |
| 49 | -2343 |
| 50 | 5419 |
| 51 | 4316 |
| 52 | 1414 |
| 53 | 70 |
| 54 | -2 |
| 55 | 1 |
| 56 | -1 |
| 57 | -512 |
| 58 | -6305 |
| 59 | -10101 |
| 60 | 34103 |
| 61 | 40024 |
| 62 | 18164 |
| 63 | 1206 |
| 64 | -93 |
| 65 | -9 |