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 | 0 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | -1 |
| 6 | -1 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | -1 |
| 11 | -1 |
| 12 | -1 |
| 13 | -2 |
| 14 | 1 |
| 15 | 2 |
| 16 | -1 |
| 17 | 2 |
| 18 | 1 |
| 19 | -3 |
| 20 | -3 |
| 21 | -1 |
| 22 | -4 |
| 23 | 4 |
| 24 | 1 |
| 25 | -3 |
| 26 | -5 |
| 27 | -9 |
| 28 | 8 |
| 29 | 15 |
| 30 | -4 |
| 31 | 17 |
| 32 | -8 |
| 33 | -23 |
| 34 | -3 |
| 35 | -21 |
| 36 | -49 |
| 37 | 52 |
| 38 | 76 |
| 39 | -47 |
| 40 | 11 |
| 41 | -133 |
| 42 | 79 |
| 43 | 238 |
| 44 | 97 |
| 45 | 518 |
| 46 | -417 |
| 47 | -750 |
| 48 | 625 |
| 49 | -647 |
| 50 | -343 |
| 51 | 1967 |
| 52 | 3048 |
| 53 | -1000 |
| 54 | 5553 |
| 55 | -8375 |
| 56 | -4233 |
| 57 | 13375 |
| 58 | 10912 |
| 59 | 33503 |