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 | -9 |
| 3 | 26 |
| 4 | -56 |
| 5 | 124 |
| 6 | -234 |
| 7 | 342 |
| 8 | -448 |
| 9 | 702 |
| 10 | -1116 |
| 11 | 1330 |
| 12 | -1456 |
| 13 | 2196 |
| 14 | -3078 |
| 15 | 3224 |
| 16 | -3584 |
| 17 | 4912 |
| 18 | -6318 |
| 19 | 6858 |
| 20 | -6944 |
| 21 | 8892 |
| 22 | -11970 |
| 23 | 12166 |
| 24 | -11648 |
| 25 | 15500 |
| 26 | -19764 |
| 27 | 18954 |
| 28 | -19152 |
| 29 | 24388 |
| 30 | -29016 |
| 31 | 29790 |
| 32 | -28672 |
| 33 | 34580 |
| 34 | -44208 |
| 35 | 42408 |
| 36 | -39312 |
| 37 | 50652 |
| 38 | -61722 |
| 39 | 57096 |
| 40 | -55552 |
| 41 | 68920 |
| 42 | -80028 |