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 | 1 |
| 4 | 1 |
| 5 | 0 |
| 6 | -1 |
| 7 | -1 |
| 8 | 0 |
| 9 | 1 |
| 10 | 0 |
| 11 | -1 |
| 12 | -1 |
| 13 | -1 |
| 14 | 1 |
| 15 | 3 |
| 16 | 3 |
| 17 | -2 |
| 18 | -5 |
| 19 | -4 |
| 20 | 0 |
| 21 | 7 |
| 22 | 7 |
| 23 | 0 |
| 24 | -9 |
| 25 | -10 |
| 26 | 2 |
| 27 | 15 |
| 28 | 15 |
| 29 | -3 |
| 30 | -27 |
| 31 | -30 |
| 32 | 3 |
| 33 | 46 |
| 34 | 51 |
| 35 | 1 |
| 36 | -71 |
| 37 | -91 |
| 38 | -7 |
| 39 | 117 |
| 40 | 157 |
| 41 | 23 |
| 42 | -194 |
| 43 | -265 |
| 44 | -57 |
| 45 | 318 |
| 46 | 465 |
| 47 | 111 |
| 48 | -536 |
| 49 | -821 |
| 50 | -230 |
| 51 | 893 |
| 52 | 1456 |
| 53 | 505 |
| 54 | -1485 |
| 55 | -2559 |
| 56 | -1036 |
| 57 | 2433 |
| 58 | 4483 |
| 59 | 2022 |