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 | 0 |
| 2 | -2 |
| 3 | -3 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 3 |
| 8 | 15 |
| 9 | 14 |
| 10 | -9 |
| 11 | -11 |
| 12 | -7 |
| 13 | 9 |
| 14 | -37 |
| 15 | -79 |
| 16 | 28 |
| 17 | 193 |
| 18 | -46 |
| 19 | -150 |
| 20 | -142 |
| 21 | -58 |
| 22 | -142 |
| 23 | 171 |
| 24 | 73 |
| 25 | 652 |
| 26 | 643 |
| 27 | 349 |
| 28 | -1047 |
| 29 | 404 |
| 30 | -2743 |
| 31 | 873 |
| 32 | 3082 |
| 33 | 2498 |
| 34 | -3039 |
| 35 | 411 |
| 36 | -2188 |
| 37 | 4534 |
| 38 | -4571 |
| 39 | -9997 |
| 40 | -5917 |
| 41 | 32879 |
| 42 | -14830 |
| 43 | -11926 |
| 44 | -16333 |
| 45 | 7208 |
| 46 | -22517 |
| 47 | 59885 |
| 48 | -27601 |