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 | -6 |
| 2 | 6 |
| 3 | 30 |
| 4 | -66 |
| 5 | -36 |
| 6 | 186 |
| 7 | -48 |
| 8 | -210 |
| 9 | 138 |
| 10 | 36 |
| 11 | -72 |
| 12 | 114 |
| 13 | -84 |
| 14 | 48 |
| 15 | 180 |
| 16 | -498 |
| 17 | -108 |
| 18 | 726 |
| 19 | -120 |
| 20 | -396 |
| 21 | 240 |
| 22 | 72 |
| 23 | -144 |
| 24 | -30 |
| 25 | -186 |
| 26 | 84 |
| 27 | 462 |
| 28 | -528 |
| 29 | -180 |
| 30 | 1116 |
| 31 | -192 |
| 32 | -1074 |
| 33 | 360 |
| 34 | 108 |
| 35 | -288 |
| 36 | 654 |
| 37 | -228 |
| 38 | 120 |
| 39 | 420 |
| 40 | -1260 |
| 41 | -252 |
| 42 | 1488 |
| 43 | -264 |
| 44 | -792 |
| 45 | 828 |
| 46 | 144 |
| 47 | -288 |
| 48 | -318 |