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 | 2 |
| 2 | 1 |
| 3 | -1 |
| 4 | -4 |
| 5 | 2 |
| 6 | 1 |
| 7 | 4 |
| 8 | -4 |
| 9 | 2 |
| 10 | -1 |
| 11 | -16 |
| 12 | 24 |
| 13 | -16 |
| 14 | 4 |
| 15 | 1 |
| 16 | 16 |
| 17 | -32 |
| 18 | 28 |
| 19 | -12 |
| 20 | 3 |
| 21 | -1 |
| 22 | -64 |
| 23 | 160 |
| 24 | -176 |
| 25 | 104 |
| 26 | -36 |
| 27 | 6 |
| 28 | 1 |
| 29 | 64 |
| 30 | -192 |
| 31 | 256 |
| 32 | -192 |
| 33 | 88 |
| 34 | -24 |
| 35 | 4 |
| 36 | -1 |
| 37 | -256 |
| 38 | 896 |
| 39 | -1408 |
| 40 | 1280 |
| 41 | -736 |
| 42 | 272 |
| 43 | -64 |
| 44 | 8 |
| 45 | 1 |
| 46 | 256 |
| 47 | -1024 |
| 48 | 1856 |
| 49 | -1984 |
| 50 | 1376 |
| 51 | -640 |
| 52 | 200 |
| 53 | -40 |
| 54 | 5 |
| 55 | -1 |
| 56 | -1024 |
| 57 | 4608 |
| 58 | -9472 |
| 59 | 11648 |
| 60 | -9472 |
| 61 | 5312 |
| 62 | -2080 |
| 63 | 560 |
| 64 | -100 |
| 65 | 10 |
| 66 | 1 |
| 67 | 1024 |