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) |
|---|---|
| 3 | 1 |
| 4 | -2 |
| 5 | 1 |
| 6 | 14 |
| 7 | -14 |
| 8 | 1 |
| 9 | 2 |
| 10 | -24 |
| 11 | 36 |
| 12 | -8 |
| 13 | -8 |
| 14 | 1 |
| 15 | 1 |
| 16 | 165 |
| 17 | -330 |
| 18 | 135 |
| 19 | 90 |
| 20 | -6 |
| 21 | -36 |
| 22 | -18 |
| 23 | 1 |
| 24 | 2 |
| 25 | 2 |
| 26 | -286 |
| 27 | 715 |
| 28 | -440 |
| 29 | -220 |
| 30 | 55 |
| 31 | 165 |
| 32 | 55 |
| 33 | -10 |
| 34 | -10 |
| 35 | -20 |
| 36 | -10 |
| 37 | 1 |
| 38 | 1 |
| 39 | 1 |
| 40 | 2002 |
| 41 | -6006 |
| 42 | 5005 |
| 43 | 2002 |
| 44 | -1144 |
| 45 | -2288 |
| 46 | -572 |
| 47 | 33 |
| 48 | 396 |
| 49 | 198 |
| 50 | 396 |
| 51 | 132 |
| 52 | -22 |
| 53 | -22 |
| 54 | -44 |
| 55 | -44 |
| 56 | -22 |
| 57 | 1 |
| 58 | 2 |
| 59 | 2 |
| 60 | 2 |