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 | -1 |
| 4 | 0 |
| 5 | -3 |
| 6 | -1 |
| 7 | -4 |
| 8 | 1 |
| 9 | -1 |
| 10 | 8 |
| 11 | 5 |
| 12 | 15 |
| 13 | 4 |
| 14 | 9 |
| 15 | -17 |
| 16 | -16 |
| 17 | -51 |
| 18 | -33 |
| 19 | -52 |
| 20 | 17 |
| 21 | 31 |
| 22 | 152 |
| 23 | 149 |
| 24 | 239 |
| 25 | 84 |
| 26 | 25 |
| 27 | -369 |
| 28 | -512 |
| 29 | -931 |
| 30 | -705 |
| 31 | -612 |
| 32 | 545 |
| 33 | 1343 |
| 34 | 3112 |
| 35 | 3365 |
| 36 | 3791 |
| 37 | 932 |
| 38 | -2007 |
| 39 | -8657 |
| 40 | -12528 |
| 41 | -17171 |
| 42 | -12385 |
| 43 | -4500 |
| 44 | 17457 |
| 45 | 37727 |
| 46 | 64184 |
| 47 | 66997 |
| 48 | 55727 |
| 49 | -5644 |
| 50 | -83911 |
| 51 | -201009 |
| 52 | -273632 |
| 53 | -306819 |