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 | -2 |
| 4 | -3 |
| 5 | -1 |
| 6 | 5 |
| 7 | 10 |
| 8 | 7 |
| 9 | -9 |
| 10 | -29 |
| 11 | -30 |
| 12 | 10 |
| 13 | 77 |
| 14 | 108 |
| 15 | 22 |
| 16 | -184 |
| 17 | -351 |
| 18 | -207 |
| 19 | 372 |
| 20 | 1041 |
| 21 | 969 |
| 22 | -516 |
| 23 | -2835 |
| 24 | -3655 |
| 25 | -284 |
| 26 | 6990 |
| 27 | 12190 |
| 28 | 5977 |
| 29 | -14957 |
| 30 | -37044 |
| 31 | -30994 |
| 32 | 24144 |
| 33 | 103374 |
| 34 | 122409 |
| 35 | -7715 |
| 36 | -262704 |
| 37 | -420585 |
| 38 | -162274 |
| 39 | 589068 |
| 40 | 1309674 |
| 41 | 972747 |
| 42 | -1057935 |
| 43 | -3742955 |