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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | -1 |
| 6 | 0 |
| 7 | 1 |
| 8 | 0 |
| 9 | -1 |
| 10 | 1 |
| 11 | 1 |
| 12 | -2 |
| 13 | -1 |
| 14 | 3 |
| 15 | 0 |
| 16 | -4 |
| 17 | 2 |
| 18 | 5 |
| 19 | -5 |
| 20 | -5 |
| 21 | 9 |
| 22 | 3 |
| 23 | -14 |
| 24 | 2 |
| 25 | 19 |
| 26 | -11 |
| 27 | -22 |
| 28 | 25 |
| 29 | 20 |
| 30 | -44 |
| 31 | -9 |
| 32 | 66 |
| 33 | -16 |
| 34 | -86 |
| 35 | 60 |
| 36 | 95 |
| 37 | -126 |
| 38 | -79 |
| 39 | 212 |
| 40 | 19 |
| 41 | -307 |
| 42 | 107 |
| 43 | 386 |
| 44 | -319 |
| 45 | -405 |
| 46 | 626 |
| 47 | 298 |
| 48 | -1012 |
| 49 | 21 |
| 50 | 1417 |
| 51 | -647 |
| 52 | -1715 |
| 53 | 1659 |
| 54 | 1694 |
| 55 | -3076 |
| 56 | -1047 |
| 57 | 4791 |
| 58 | -612 |
| 59 | -6485 |
| 60 | 3688 |
| 61 | 7532 |
| 62 | -8479 |
| 63 | -6920 |
| 64 | 14964 |
| 65 | 3232 |