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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | -2 |
| 4 | 0 |
| 5 | -3 |
| 6 | 2 |
| 7 | 5 |
| 8 | -8 |
| 9 | 10 |
| 10 | -4 |
| 11 | 9 |
| 12 | 16 |
| 13 | 6 |
| 14 | -6 |
| 15 | -20 |
| 16 | -15 |
| 17 | 17 |
| 18 | -26 |
| 19 | -19 |
| 20 | -10 |
| 21 | 21 |
| 22 | 34 |
| 23 | 12 |
| 24 | -38 |
| 25 | 14 |
| 26 | 29 |
| 27 | -44 |
| 28 | 46 |
| 29 | -31 |
| 30 | -16 |
| 31 | -18 |
| 32 | -56 |
| 33 | -39 |
| 34 | 20 |
| 35 | 64 |
| 36 | -43 |
| 37 | 45 |
| 38 | 70 |
| 39 | 24 |
| 40 | -74 |
| 41 | -51 |
| 42 | 26 |
| 43 | 82 |
| 44 | -55 |
| 45 | -28 |
| 46 | 57 |
| 47 | -30 |
| 48 | 32 |
| 49 | 65 |
| 50 | -98 |
| 51 | 100 |
| 52 | -34 |
| 53 | 69 |
| 54 | 36 |
| 55 | -110 |
| 56 | -75 |
| 57 | 77 |
| 58 | -116 |
| 59 | -79 |
| 60 | -40 |
| 61 | 81 |
| 62 | 42 |
| 63 | 44 |
| 64 | 89 |