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 | 0 |
| 3 | 0 |
| 4 | -4 |
| 5 | 4 |
| 6 | 0 |
| 7 | -7 |
| 8 | 13 |
| 9 | -6 |
| 10 | -10 |
| 11 | 38 |
| 12 | -32 |
| 13 | -9 |
| 14 | 74 |
| 15 | -103 |
| 16 | 27 |
| 17 | 137 |
| 18 | -266 |
| 19 | 153 |
| 20 | 191 |
| 21 | -593 |
| 22 | 537 |
| 23 | 167 |
| 24 | -1161 |
| 25 | 1437 |
| 26 | -222 |
| 27 | -2035 |
| 28 | 3397 |
| 29 | -1578 |
| 30 | -3110 |
| 31 | 7160 |
| 32 | -5285 |
| 33 | -3712 |
| 34 | 13942 |
| 35 | -13920 |
| 36 | -2002 |
| 37 | 24848 |
| 38 | -32241 |
| 39 | 6764 |
| 40 | 40661 |
| 41 | -68059 |
| 42 | 32487 |
| 43 | 59109 |
| 44 | -133506 |
| 45 | 95221 |
| 46 | 71243 |