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 | -1 |
| 5 | 1 |
| 6 | 4 |
| 7 | -4 |
| 8 | -1 |
| 9 | -3 |
| 10 | 3 |
| 11 | 12 |
| 12 | -12 |
| 13 | -2 |
| 14 | -8 |
| 15 | 8 |
| 16 | 31 |
| 17 | -30 |
| 18 | -5 |
| 19 | -20 |
| 20 | 19 |
| 21 | 72 |
| 22 | -68 |
| 23 | -12 |
| 24 | -44 |
| 25 | 41 |
| 26 | 154 |
| 27 | -144 |
| 28 | -24 |
| 29 | -90 |
| 30 | 84 |
| 31 | 312 |
| 32 | -289 |
| 33 | -48 |
| 34 | -178 |
| 35 | 164 |
| 36 | 603 |
| 37 | -554 |
| 38 | -92 |
| 39 | -336 |
| 40 | 307 |
| 41 | 1122 |
| 42 | -1024 |
| 43 | -168 |
| 44 | -612 |
| 45 | 557 |
| 46 | 2024 |
| 47 | -1836 |
| 48 | -300 |
| 49 | -1087 |
| 50 | 983 |
| 51 | 3552 |
| 52 | -3206 |
| 53 | -522 |
| 54 | -1880 |
| 55 | 1692 |
| 56 | 6088 |
| 57 | -5472 |
| 58 | -886 |
| 59 | -3180 |