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 | 2 |
| 2 | -1 |
| 3 | 3 |
| 4 | -2 |
| 5 | 4 |
| 6 | -2 |
| 7 | -2 |
| 8 | 1 |
| 9 | 5 |
| 10 | 0 |
| 11 | -9 |
| 12 | 6 |
| 13 | -1 |
| 14 | 6 |
| 15 | 5 |
| 16 | -24 |
| 17 | 18 |
| 18 | -4 |
| 19 | 7 |
| 20 | 14 |
| 21 | -49 |
| 22 | 36 |
| 23 | -4 |
| 24 | -4 |
| 25 | 1 |
| 26 | 8 |
| 27 | 28 |
| 28 | -84 |
| 29 | 50 |
| 30 | 20 |
| 31 | -30 |
| 32 | 10 |
| 33 | -1 |
| 34 | 9 |
| 35 | 48 |
| 36 | -126 |
| 37 | 36 |
| 38 | 115 |
| 39 | -120 |
| 40 | 45 |
| 41 | -6 |
| 42 | 10 |
| 43 | 75 |
| 44 | -168 |
| 45 | -48 |
| 46 | 358 |
| 47 | -335 |
| 48 | 120 |
| 49 | -6 |
| 50 | -6 |
| 51 | 1 |
| 52 | 11 |
| 53 | 110 |
| 54 | -198 |
| 55 | -264 |
| 56 | 847 |
| 57 | -714 |
| 58 | 175 |
| 59 | 84 |
| 60 | -63 |
| 61 | 14 |