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 | -1 |
| 2 | -2 |
| 3 | -1 |
| 4 | -1 |
| 5 | 5 |
| 6 | 1 |
| 7 | 13 |
| 8 | 4 |
| 9 | 0 |
| 10 | 2 |
| 11 | -8 |
| 12 | -61 |
| 13 | -31 |
| 14 | 13 |
| 15 | -156 |
| 16 | 21 |
| 17 | 11 |
| 18 | 223 |
| 19 | 92 |
| 20 | 91 |
| 21 | 426 |
| 22 | 972 |
| 23 | 165 |
| 24 | 141 |
| 25 | -1126 |
| 26 | 440 |
| 27 | 1294 |
| 28 | -4684 |
| 29 | -2755 |
| 30 | -5748 |
| 31 | -2414 |
| 32 | -6679 |
| 33 | 10511 |
| 34 | -10048 |
| 35 | -19369 |
| 36 | 19635 |
| 37 | 22629 |
| 38 | 14027 |
| 39 | 76969 |
| 40 | -1990 |
| 41 | 40193 |
| 42 | -10678 |
| 43 | 75795 |
| 44 | 215767 |
| 45 | -54322 |
| 46 | -40882 |