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 | -1 |
| 3 | -2 |
| 4 | -4 |
| 5 | -2 |
| 6 | -5 |
| 7 | 6 |
| 8 | 7 |
| 9 | 18 |
| 10 | 31 |
| 11 | 50 |
| 12 | 17 |
| 13 | 34 |
| 14 | 39 |
| 15 | -122 |
| 16 | -134 |
| 17 | -296 |
| 18 | -298 |
| 19 | -556 |
| 20 | -670 |
| 21 | -692 |
| 22 | 64 |
| 23 | 26 |
| 24 | 1119 |
| 25 | 1054 |
| 26 | 3953 |
| 27 | 6804 |
| 28 | 6645 |
| 29 | 9250 |
| 30 | 8644 |
| 31 | 9702 |
| 32 | 2817 |
| 33 | 11386 |
| 34 | -12415 |
| 35 | -36382 |
| 36 | -47757 |
| 37 | -71782 |
| 38 | -122506 |
| 39 | -99540 |
| 40 | -191083 |
| 41 | -176382 |
| 42 | -253722 |
| 43 | -166706 |
| 44 | -21024 |