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 | -12 |
| 2 | 54 |
| 3 | -84 |
| 4 | -147 |
| 5 | 756 |
| 6 | -756 |
| 7 | -1212 |
| 8 | 3510 |
| 9 | -2028 |
| 10 | -3402 |
| 11 | 7992 |
| 12 | -6132 |
| 13 | -5964 |
| 14 | 18576 |
| 15 | -10584 |
| 16 | -14619 |
| 17 | 29484 |
| 18 | -18252 |
| 19 | -21084 |
| 20 | 55188 |
| 21 | -28896 |
| 22 | -35964 |
| 23 | 73008 |
| 24 | -49140 |
| 25 | -46128 |
| 26 | 118692 |
| 27 | -54516 |
| 28 | -73896 |
| 29 | 146340 |
| 30 | -95256 |
| 31 | -92148 |
| 32 | 224694 |
| 33 | -111888 |
| 34 | -132678 |
| 35 | 260064 |