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 | 3 |
| 2 | 1 |
| 3 | -3 |
| 4 | -1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 6 |
| 8 | 0 |
| 9 | -6 |
| 10 | -3 |
| 11 | -3 |
| 12 | 4 |
| 13 | 12 |
| 14 | 1 |
| 15 | -12 |
| 16 | -6 |
| 17 | -3 |
| 18 | 5 |
| 19 | 24 |
| 20 | 1 |
| 21 | -24 |
| 22 | -10 |
| 23 | -6 |
| 24 | 11 |
| 25 | 42 |
| 26 | 4 |
| 27 | -42 |
| 28 | -19 |
| 29 | -12 |
| 30 | 17 |
| 31 | 72 |
| 32 | 4 |
| 33 | -69 |
| 34 | -31 |
| 35 | -18 |
| 36 | 31 |
| 37 | 120 |
| 38 | 9 |
| 39 | -114 |
| 40 | -50 |
| 41 | -30 |
| 42 | 46 |
| 43 | 189 |
| 44 | 11 |
| 45 | -180 |
| 46 | -79 |
| 47 | -48 |
| 48 | 77 |
| 49 | 294 |
| 50 | 21 |
| 51 | -276 |
| 52 | -122 |
| 53 | -72 |
| 54 | 112 |
| 55 | 450 |
| 56 | 28 |
| 57 | -420 |
| 58 | -183 |
| 59 | -108 |