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 | -4 |
| 2 | 10 |
| 3 | -16 |
| 4 | 15 |
| 5 | 0 |
| 6 | -30 |
| 7 | 64 |
| 8 | -81 |
| 9 | 60 |
| 10 | 12 |
| 11 | -128 |
| 12 | 250 |
| 13 | -312 |
| 14 | 234 |
| 15 | 32 |
| 16 | -443 |
| 17 | 848 |
| 18 | -1014 |
| 19 | 720 |
| 20 | 109 |
| 21 | -1312 |
| 22 | 2448 |
| 23 | -2880 |
| 24 | 2033 |
| 25 | 280 |
| 26 | -3550 |
| 27 | 6512 |
| 28 | -7513 |
| 29 | 5184 |
| 30 | 744 |
| 31 | -8832 |
| 32 | 15980 |
| 33 | -18252 |
| 34 | 12492 |
| 35 | 1712 |
| 36 | -20745 |
| 37 | 37168 |
| 38 | -41942 |
| 39 | 28352 |
| 40 | 3918 |
| 41 | -46288 |
| 42 | 82146 |