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 | 2 |
| 5 | -2 |
| 6 | 1 |
| 7 | -1 |
| 8 | 2 |
| 9 | -3 |
| 10 | 2 |
| 11 | -2 |
| 12 | 4 |
| 13 | -5 |
| 14 | 4 |
| 15 | -4 |
| 16 | 7 |
| 17 | -8 |
| 18 | 7 |
| 19 | -7 |
| 20 | 9 |
| 21 | -10 |
| 22 | 8 |
| 23 | -8 |
| 24 | 11 |
| 25 | -14 |
| 26 | 13 |
| 27 | -13 |
| 28 | 16 |
| 29 | -18 |
| 30 | 17 |
| 31 | -16 |
| 32 | 19 |
| 33 | -22 |
| 34 | 23 |
| 35 | -23 |
| 36 | 26 |
| 37 | -29 |
| 38 | 29 |
| 39 | -30 |
| 40 | 34 |
| 41 | -38 |
| 42 | 38 |
| 43 | -39 |
| 44 | 44 |
| 45 | -48 |
| 46 | 47 |
| 47 | -48 |
| 48 | 56 |
| 49 | -64 |
| 50 | 65 |
| 51 | -66 |
| 52 | 75 |
| 53 | -82 |
| 54 | 80 |
| 55 | -80 |
| 56 | 90 |
| 57 | -99 |
| 58 | 98 |
| 59 | -100 |
| 60 | 114 |