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 | 0 |
| 1 | 1 |
| 2 | -8 |
| 3 | 28 |
| 4 | -64 |
| 5 | 126 |
| 6 | -224 |
| 7 | 344 |
| 8 | -512 |
| 9 | 757 |
| 10 | -1008 |
| 11 | 1332 |
| 12 | -1792 |
| 13 | 2198 |
| 14 | -2752 |
| 15 | 3528 |
| 16 | -4096 |
| 17 | 4914 |
| 18 | -6056 |
| 19 | 6860 |
| 20 | -8064 |
| 21 | 9632 |
| 22 | -10656 |
| 23 | 12168 |
| 24 | -14336 |
| 25 | 15751 |
| 26 | -17584 |
| 27 | 20440 |
| 28 | -22016 |
| 29 | 24390 |
| 30 | -28224 |
| 31 | 29792 |
| 32 | -32768 |
| 33 | 37296 |
| 34 | -39312 |
| 35 | 43344 |
| 36 | -48448 |
| 37 | 50654 |
| 38 | -54880 |
| 39 | 61544 |
| 40 | -64512 |
| 41 | 68922 |