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 | -4 |
| 5 | 1 |
| 6 | -1 |
| 7 | 9 |
| 8 | -7 |
| 9 | 1 |
| 10 | 1 |
| 11 | -16 |
| 12 | 26 |
| 13 | -10 |
| 14 | 1 |
| 15 | -1 |
| 16 | 25 |
| 17 | -70 |
| 18 | 52 |
| 19 | -13 |
| 20 | 1 |
| 21 | 1 |
| 22 | -36 |
| 23 | 155 |
| 24 | -190 |
| 25 | 87 |
| 26 | -16 |
| 27 | 1 |
| 28 | -1 |
| 29 | 49 |
| 30 | -301 |
| 31 | 553 |
| 32 | -403 |
| 33 | 131 |
| 34 | -19 |
| 35 | 1 |
| 36 | 1 |
| 37 | -64 |
| 38 | 532 |
| 39 | -1372 |
| 40 | 1462 |
| 41 | -736 |
| 42 | 184 |
| 43 | -22 |
| 44 | 1 |
| 45 | -1 |
| 46 | 81 |
| 47 | -876 |
| 48 | 3024 |
| 49 | -4446 |
| 50 | 3206 |
| 51 | -1216 |
| 52 | 246 |
| 53 | -25 |
| 54 | 1 |
| 55 | 1 |
| 56 | -100 |
| 57 | 1365 |
| 58 | -6084 |
| 59 | 11826 |
| 60 | -11584 |
| 61 | 6190 |
| 62 | -1870 |
| 63 | 317 |
| 64 | -28 |
| 65 | 1 |
| 66 | -1 |
| 67 | 121 |
| 68 | -2035 |