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 | -2 |
| 2 | 0 |
| 3 | 3 |
| 4 | -3 |
| 5 | 0 |
| 6 | 4 |
| 7 | -7 |
| 8 | 5 |
| 9 | 5 |
| 10 | -16 |
| 11 | 15 |
| 12 | 2 |
| 13 | -26 |
| 14 | 39 |
| 15 | -19 |
| 16 | -37 |
| 17 | 88 |
| 18 | -73 |
| 19 | -28 |
| 20 | 160 |
| 21 | -207 |
| 22 | 61 |
| 23 | 249 |
| 24 | -484 |
| 25 | 339 |
| 26 | 258 |
| 27 | -950 |
| 28 | 1063 |
| 29 | -99 |
| 30 | -1593 |
| 31 | 2628 |
| 32 | -1469 |
| 33 | -1996 |
| 34 | 5492 |
| 35 | -5287 |
| 36 | -763 |
| 37 | 9837 |
| 38 | -14008 |
| 39 | 5671 |
| 40 | 14034 |
| 41 | -31042 |
| 42 | 25319 |
| 43 | 11389 |
| 44 | -59053 |
| 45 | 73040 |
| 46 | -16961 |
| 47 | -92844 |