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 | -5 |
| 3 | 8 |
| 4 | -12 |
| 5 | 24 |
| 6 | -40 |
| 7 | 48 |
| 8 | -48 |
| 9 | 72 |
| 10 | -120 |
| 11 | 120 |
| 12 | -96 |
| 13 | 168 |
| 14 | -240 |
| 15 | 192 |
| 16 | -192 |
| 17 | 288 |
| 18 | -360 |
| 19 | 360 |
| 20 | -288 |
| 21 | 384 |
| 22 | -600 |
| 23 | 528 |
| 24 | -384 |
| 25 | 600 |
| 26 | -840 |
| 27 | 648 |
| 28 | -576 |
| 29 | 840 |
| 30 | -960 |
| 31 | 960 |
| 32 | -768 |
| 33 | 960 |
| 34 | -1440 |
| 35 | 1152 |
| 36 | -864 |
| 37 | 1368 |
| 38 | -1800 |
| 39 | 1344 |
| 40 | -1152 |
| 41 | 1680 |
| 42 | -1920 |
| 43 | 1848 |
| 44 | -1440 |
| 45 | 1728 |
| 46 | -2640 |
| 47 | 2208 |
| 48 | -1536 |
| 49 | 2352 |
| 50 | -3000 |