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 | -1 |
| 4 | -1 |
| 5 | 0 |
| 6 | -3 |
| 7 | -1 |
| 8 | 2 |
| 9 | -4 |
| 10 | -2 |
| 11 | -1 |
| 12 | 6 |
| 13 | -8 |
| 14 | 1 |
| 15 | -4 |
| 16 | -1 |
| 17 | 14 |
| 18 | -22 |
| 19 | 11 |
| 20 | -5 |
| 21 | -4 |
| 22 | -1 |
| 23 | 30 |
| 24 | -68 |
| 25 | 49 |
| 26 | -15 |
| 27 | -1 |
| 28 | -6 |
| 29 | -1 |
| 30 | 62 |
| 31 | -214 |
| 32 | 203 |
| 33 | -77 |
| 34 | 15 |
| 35 | -9 |
| 36 | -4 |
| 37 | -1 |
| 38 | 126 |
| 39 | -668 |
| 40 | 841 |
| 41 | -423 |
| 42 | 119 |
| 43 | -35 |
| 44 | 4 |
| 45 | -7 |
| 46 | -1 |
| 47 | 254 |
| 48 | -2062 |
| 49 | 3491 |
| 50 | -2285 |
| 51 | 807 |
| 52 | -225 |
| 53 | 48 |
| 54 | -9 |
| 55 | -7 |
| 56 | -1 |
| 57 | 510 |
| 58 | -6308 |
| 59 | 14449 |