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 | 2 |
| 4 | -4 |
| 5 | 1 |
| 6 | -2 |
| 7 | 8 |
| 8 | -6 |
| 9 | 1 |
| 10 | 2 |
| 11 | -12 |
| 12 | 18 |
| 13 | -8 |
| 14 | 1 |
| 15 | -2 |
| 16 | 16 |
| 17 | -38 |
| 18 | 32 |
| 19 | -10 |
| 20 | 1 |
| 21 | 2 |
| 22 | -20 |
| 23 | 66 |
| 24 | -88 |
| 25 | 50 |
| 26 | -12 |
| 27 | 1 |
| 28 | -2 |
| 29 | 24 |
| 30 | -102 |
| 31 | 192 |
| 32 | -170 |
| 33 | 72 |
| 34 | -14 |
| 35 | 1 |
| 36 | 2 |
| 37 | -28 |
| 38 | 146 |
| 39 | -360 |
| 40 | 450 |
| 41 | -292 |
| 42 | 98 |
| 43 | -16 |
| 44 | 1 |
| 45 | -2 |
| 46 | 32 |
| 47 | -198 |
| 48 | 608 |
| 49 | -1002 |
| 50 | 912 |
| 51 | -462 |
| 52 | 128 |
| 53 | -18 |
| 54 | 1 |
| 55 | 2 |
| 56 | -36 |
| 57 | 258 |
| 58 | -952 |
| 59 | 1970 |
| 60 | -2364 |