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 | -2 |
| 3 | 6 |
| 4 | -5 |
| 5 | -9 |
| 6 | 10 |
| 7 | -9 |
| 8 | -21 |
| 9 | -20 |
| 10 | 15 |
| 11 | -14 |
| 12 | -36 |
| 13 | -45 |
| 14 | -35 |
| 15 | 21 |
| 16 | -20 |
| 17 | -54 |
| 18 | -75 |
| 19 | -77 |
| 20 | -54 |
| 21 | 28 |
| 22 | -27 |
| 23 | -75 |
| 24 | -110 |
| 25 | -126 |
| 26 | -117 |
| 27 | -77 |
| 28 | 36 |
| 29 | -35 |
| 30 | -99 |
| 31 | -150 |
| 32 | -182 |
| 33 | -189 |
| 34 | -165 |
| 35 | -104 |
| 36 | 45 |
| 37 | -44 |
| 38 | -126 |
| 39 | -195 |
| 40 | -245 |
| 41 | -270 |
| 42 | -264 |
| 43 | -221 |
| 44 | -135 |
| 45 | 55 |
| 46 | -54 |
| 47 | -156 |
| 48 | -245 |
| 49 | -315 |
| 50 | -360 |
| 51 | -374 |
| 52 | -351 |
| 53 | -285 |
| 54 | -170 |