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 | -2 |
| 3 | -12 |
| 4 | -10 |
| 5 | 12 |
| 6 | 44 |
| 7 | 40 |
| 8 | -26 |
| 9 | -132 |
| 10 | -60 |
| 11 | 104 |
| 12 | 156 |
| 13 | -152 |
| 14 | -136 |
| 15 | 80 |
| 16 | 1030 |
| 17 | 204 |
| 18 | -1548 |
| 19 | -3736 |
| 20 | 1780 |
| 21 | 5096 |
| 22 | 7496 |
| 23 | -8208 |
| 24 | -9956 |
| 25 | -11416 |
| 26 | 30824 |
| 27 | 2784 |
| 28 | -296 |
| 29 | -72768 |
| 30 | 62032 |
| 31 | 22752 |
| 32 | 157126 |
| 33 | -290356 |
| 34 | -41420 |
| 35 | -244296 |
| 36 | 896996 |
| 37 | -285896 |
| 38 | 436040 |
| 39 | -2139120 |
| 40 | 1661940 |
| 41 | -1028632 |
| 42 | 4535608 |
| 43 | -6487744 |
| 44 | 4125224 |