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 | 0 |
| 4 | 0 |
| 5 | -1 |
| 6 | 1 |
| 7 | -1 |
| 8 | 0 |
| 9 | 1 |
| 10 | -2 |
| 11 | 0 |
| 12 | 1 |
| 13 | -1 |
| 14 | -2 |
| 15 | 2 |
| 16 | 1 |
| 17 | -2 |
| 18 | -2 |
| 19 | 2 |
| 20 | 0 |
| 21 | -4 |
| 22 | 0 |
| 23 | 3 |
| 24 | -3 |
| 25 | 3 |
| 26 | -3 |
| 27 | -2 |
| 28 | -1 |
| 29 | 1 |
| 30 | 8 |
| 31 | -15 |
| 32 | 0 |
| 33 | 17 |
| 34 | -14 |
| 35 | -1 |
| 36 | -3 |
| 37 | 9 |
| 38 | -5 |
| 39 | -18 |
| 40 | 23 |
| 41 | -10 |
| 42 | -18 |
| 43 | 24 |
| 44 | -17 |
| 45 | -17 |
| 46 | 18 |
| 47 | 27 |
| 48 | -48 |
| 49 | -37 |
| 50 | 72 |
| 51 | 45 |
| 52 | -119 |
| 53 | -11 |
| 54 | 148 |
| 55 | -98 |
| 56 | -28 |
| 57 | 65 |
| 58 | -57 |
| 59 | 24 |
| 60 | -95 |
| 61 | 213 |
| 62 | -363 |
| 63 | -173 |
| 64 | 704 |
| 65 | -435 |