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 | -1 |
| 2 | 1 |
| 3 | -3 |
| 4 | 0 |
| 5 | 1 |
| 6 | -12 |
| 7 | -1 |
| 8 | 1 |
| 9 | 1 |
| 10 | -55 |
| 11 | -6 |
| 12 | 2 |
| 13 | 2 |
| 14 | 1 |
| 15 | -273 |
| 16 | -33 |
| 17 | 5 |
| 18 | 6 |
| 19 | 3 |
| 20 | 1 |
| 21 | -1428 |
| 22 | -182 |
| 23 | 13 |
| 24 | 22 |
| 25 | 11 |
| 26 | 4 |
| 27 | 1 |
| 28 | -7752 |
| 29 | -1020 |
| 30 | 28 |
| 31 | 91 |
| 32 | 46 |
| 33 | 17 |
| 34 | 5 |
| 35 | 1 |
| 36 | -43263 |
| 37 | -5814 |
| 38 | 0 |
| 39 | 408 |
| 40 | 210 |
| 41 | 78 |
| 42 | 24 |
| 43 | 6 |
| 44 | 1 |
| 45 | -246675 |
| 46 | -33649 |
| 47 | -627 |
| 48 | 1938 |
| 49 | 1020 |
| 50 | 380 |
| 51 | 119 |
| 52 | 32 |
| 53 | 7 |
| 54 | 1 |
| 55 | -1430715 |
| 56 | -197340 |
| 57 | -6325 |
| 58 | 9614 |
| 59 | 5187 |
| 60 | 1938 |
| 61 | 612 |
| 62 | 170 |
| 63 | 41 |
| 64 | 8 |
| 65 | 1 |