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 | 1 |
| 3 | -6 |
| 4 | 24 |
| 5 | 3 |
| 6 | -20 |
| 7 | -27 |
| 8 | 40 |
| 9 | -2 |
| 10 | -36 |
| 11 | -186 |
| 12 | 579 |
| 13 | -118 |
| 14 | 274 |
| 15 | -347 |
| 16 | 46 |
| 17 | -892 |
| 18 | 74 |
| 19 | -76 |
| 20 | 3106 |
| 21 | -3192 |
| 22 | -1013 |
| 23 | -4844 |
| 24 | 12276 |
| 25 | -752 |
| 26 | 2145 |
| 27 | -656 |
| 28 | 11198 |
| 29 | -11160 |
| 30 | -2246 |
| 31 | -38752 |
| 32 | 32106 |
| 33 | -24272 |
| 34 | 42182 |
| 35 | -7533 |
| 36 | 36054 |
| 37 | -78906 |
| 38 | -4482 |
| 39 | -164462 |
| 40 | 381837 |
| 41 | -174346 |
| 42 | 21356 |
| 43 | -114910 |