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 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | -1 |
| 5 | 1 |
| 6 | 0 |
| 7 | 0 |
| 8 | -3 |
| 9 | 1 |
| 10 | 0 |
| 11 | 1 |
| 12 | 3 |
| 13 | -6 |
| 14 | 1 |
| 15 | 0 |
| 16 | 1 |
| 17 | 5 |
| 18 | 15 |
| 19 | -10 |
| 20 | 1 |
| 21 | 0 |
| 22 | -2 |
| 23 | -9 |
| 24 | 0 |
| 25 | 45 |
| 26 | -15 |
| 27 | 1 |
| 28 | 0 |
| 29 | -9 |
| 30 | -35 |
| 31 | -84 |
| 32 | -70 |
| 33 | 105 |
| 34 | -21 |
| 35 | 1 |
| 36 | 0 |
| 37 | -9 |
| 38 | 19 |
| 39 | -14 |
| 40 | -259 |
| 41 | -350 |
| 42 | 210 |
| 43 | -28 |
| 44 | 1 |
| 45 | 0 |
| 46 | 50 |
| 47 | 369 |
| 48 | 873 |
| 49 | 966 |
| 50 | -189 |
| 51 | -1134 |
| 52 | 378 |
| 53 | -36 |
| 54 | 1 |
| 55 | 0 |
| 56 | 267 |
| 57 | 611 |
| 58 | 1260 |
| 59 | 3645 |
| 60 | 5565 |
| 61 | 1827 |
| 62 | -2940 |
| 63 | 630 |
| 64 | -45 |
| 65 | 1 |