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 | -1 |
| 6 | -1 |
| 7 | 1 |
| 8 | 0 |
| 9 | 2 |
| 10 | 1 |
| 11 | 1 |
| 12 | -2 |
| 13 | 4 |
| 14 | 3 |
| 15 | 1 |
| 16 | -1 |
| 17 | 3 |
| 18 | -11 |
| 19 | -5 |
| 20 | -5 |
| 21 | -1 |
| 22 | -1 |
| 23 | -1 |
| 24 | -34 |
| 25 | 10 |
| 26 | -20 |
| 27 | -8 |
| 28 | -1 |
| 29 | 1 |
| 30 | 11 |
| 31 | 106 |
| 32 | -116 |
| 33 | 96 |
| 34 | 44 |
| 35 | 13 |
| 36 | 1 |
| 37 | 1 |
| 38 | 15 |
| 39 | 368 |
| 40 | -328 |
| 41 | 716 |
| 42 | 86 |
| 43 | 125 |
| 44 | 21 |
| 45 | 1 |
| 46 | -1 |
| 47 | 13 |
| 48 | -1324 |
| 49 | -1344 |
| 50 | -5634 |
| 51 | 1866 |
| 52 | -1063 |
| 53 | -316 |
| 54 | -34 |
| 55 | -1 |
| 56 | -1 |
| 57 | 77 |
| 58 | -4811 |
| 59 | -17235 |