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) |
|---|---|
| 1 | 1 |
| 2 | -3 |
| 3 | -8 |
| 4 | 13 |
| 5 | -24 |
| 6 | 24 |
| 7 | -48 |
| 8 | -51 |
| 9 | 73 |
| 10 | 72 |
| 11 | -120 |
| 12 | -104 |
| 13 | -168 |
| 14 | 144 |
| 15 | 192 |
| 16 | 205 |
| 17 | -288 |
| 18 | -219 |
| 19 | -360 |
| 20 | -312 |
| 21 | 384 |
| 22 | 360 |
| 23 | -528 |
| 24 | 408 |
| 25 | 601 |
| 26 | 504 |
| 27 | -656 |
| 28 | -624 |
| 29 | -840 |
| 30 | -576 |
| 31 | -960 |
| 32 | -819 |
| 33 | 960 |
| 34 | 864 |
| 35 | 1152 |
| 36 | 949 |
| 37 | -1368 |
| 38 | 1080 |
| 39 | 1344 |
| 40 | 1224 |
| 41 | -1680 |
| 42 | -1152 |
| 43 | -1848 |
| 44 | -1560 |
| 45 | -1752 |
| 46 | 1584 |
| 47 | -2208 |
| 48 | -1640 |
| 49 | 2353 |
| 50 | -1803 |