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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | -2 |
| 6 | 0 |
| 7 | -8 |
| 8 | 4 |
| 9 | 4 |
| 10 | -4 |
| 11 | -20 |
| 12 | 0 |
| 13 | -50 |
| 14 | -16 |
| 15 | 2 |
| 16 | 8 |
| 17 | -110 |
| 18 | 8 |
| 19 | -236 |
| 20 | -8 |
| 21 | -8 |
| 22 | -40 |
| 23 | -488 |
| 24 | 0 |
| 25 | 14 |
| 26 | -100 |
| 27 | 18 |
| 28 | -32 |
| 29 | -994 |
| 30 | 4 |
| 31 | -2016 |
| 32 | 16 |
| 33 | -28 |
| 34 | -220 |
| 35 | 8 |
| 36 | 16 |
| 37 | -4058 |
| 38 | -472 |
| 39 | -86 |
| 40 | -16 |
| 41 | -8150 |
| 42 | -16 |
| 43 | -16340 |
| 44 | -80 |
| 45 | 20 |
| 46 | -976 |
| 47 | -32720 |
| 48 | 0 |
| 49 | 26 |
| 50 | 28 |
| 51 | -202 |
| 52 | -200 |
| 53 | -65482 |
| 54 | 36 |
| 55 | -4 |
| 56 | -64 |
| 57 | -452 |
| 58 | -1988 |
| 59 | -131012 |
| 60 | 8 |
| 61 | -262082 |
| 62 | -4032 |
| 63 | 6 |
| 64 | 32 |
| 65 | -58 |
| 66 | -56 |