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 | 1 |
| 4 | -5 |
| 5 | 1 |
| 6 | -1 |
| 7 | 12 |
| 8 | -9 |
| 9 | 1 |
| 10 | 1 |
| 11 | -22 |
| 12 | 39 |
| 13 | -13 |
| 14 | 1 |
| 15 | -1 |
| 16 | 35 |
| 17 | -115 |
| 18 | 82 |
| 19 | -17 |
| 20 | 1 |
| 21 | 1 |
| 22 | -51 |
| 23 | 270 |
| 24 | -344 |
| 25 | 141 |
| 26 | -21 |
| 27 | 1 |
| 28 | -1 |
| 29 | 70 |
| 30 | -546 |
| 31 | 1106 |
| 32 | -773 |
| 33 | 216 |
| 34 | -25 |
| 35 | 1 |
| 36 | 1 |
| 37 | -92 |
| 38 | 994 |
| 39 | -2954 |
| 40 | 3199 |
| 41 | -1466 |
| 42 | 307 |
| 43 | -29 |
| 44 | 1 |
| 45 | -1 |
| 46 | 117 |
| 47 | -1674 |
| 48 | 6888 |
| 49 | -10791 |
| 50 | 7461 |
| 51 | -2487 |
| 52 | 414 |
| 53 | -33 |
| 54 | 1 |
| 55 | 1 |
| 56 | -145 |
| 57 | 2655 |
| 58 | -14484 |
| 59 | 31179 |
| 60 | -30645 |
| 61 | 15060 |
| 62 | -3900 |
| 63 | 537 |
| 64 | -37 |
| 65 | 1 |