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) |
|---|---|
| 2 | 1 |
| 3 | 3 |
| 4 | -2 |
| 5 | 2 |
| 6 | 6 |
| 7 | -9 |
| 8 | 3 |
| 9 | 15 |
| 10 | 0 |
| 11 | -24 |
| 12 | 18 |
| 13 | -4 |
| 14 | 5 |
| 15 | 69 |
| 16 | -75 |
| 17 | -20 |
| 18 | 60 |
| 19 | -30 |
| 20 | 5 |
| 21 | 63 |
| 22 | 217 |
| 23 | -462 |
| 24 | 225 |
| 25 | 80 |
| 26 | -120 |
| 27 | 45 |
| 28 | -6 |
| 29 | 14 |
| 30 | 462 |
| 31 | 300 |
| 32 | -1848 |
| 33 | 1785 |
| 34 | -525 |
| 35 | -210 |
| 36 | 210 |
| 37 | -63 |
| 38 | 7 |
| 39 | 252 |
| 40 | 2460 |
| 41 | -1809 |
| 42 | -4932 |
| 43 | 8428 |
| 44 | -5208 |
| 45 | 1050 |
| 46 | 448 |
| 47 | -336 |
| 48 | 84 |
| 49 | -8 |
| 50 | 42 |
| 51 | 2556 |
| 52 | 9747 |
| 53 | -18775 |
| 54 | -2655 |
| 55 | 28296 |
| 56 | -28182 |
| 57 | 12726 |
| 58 | -1890 |
| 59 | -840 |
| 60 | 504 |
| 61 | -108 |
| 62 | 9 |