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 | 14 |
| 2 | 42 |
| 3 | -14 |
| 4 | -70 |
| 5 | -42 |
| 6 | 70 |
| 7 | -140 |
| 8 | 42 |
| 9 | 126 |
| 10 | 210 |
| 11 | -84 |
| 12 | 294 |
| 13 | -294 |
| 14 | -84 |
| 15 | 0 |
| 16 | 154 |
| 17 | -504 |
| 18 | 378 |
| 19 | -630 |
| 20 | 882 |
| 21 | -350 |
| 22 | -252 |
| 23 | 252 |
| 24 | 1190 |
| 25 | 350 |
| 26 | 1470 |
| 27 | -1148 |
| 28 | 1372 |
| 29 | -756 |
| 30 | 0 |
| 31 | -1680 |
| 32 | -630 |
| 33 | -1708 |
| 34 | 2520 |
| 35 | -1050 |
| 36 | -630 |
| 37 | -532 |
| 38 | 3150 |
| 39 | 0 |
| 40 | 3570 |
| 41 | -2940 |
| 42 | 1750 |
| 43 | 812 |
| 44 | 420 |
| 45 | -3066 |
| 46 | 756 |
| 47 | -3864 |