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 | -1 |
| 2 | 1 |
| 3 | -2 |
| 4 | 1 |
| 5 | 1 |
| 6 | -4 |
| 7 | 0 |
| 8 | 3 |
| 9 | 1 |
| 10 | -8 |
| 11 | -4 |
| 12 | 6 |
| 13 | 5 |
| 14 | 1 |
| 15 | -16 |
| 16 | -16 |
| 17 | 8 |
| 18 | 16 |
| 19 | 7 |
| 20 | 1 |
| 21 | -32 |
| 22 | -48 |
| 23 | 0 |
| 24 | 40 |
| 25 | 30 |
| 26 | 9 |
| 27 | 1 |
| 28 | -64 |
| 29 | -128 |
| 30 | -48 |
| 31 | 80 |
| 32 | 100 |
| 33 | 48 |
| 34 | 11 |
| 35 | 1 |
| 36 | -128 |
| 37 | -320 |
| 38 | -224 |
| 39 | 112 |
| 40 | 280 |
| 41 | 196 |
| 42 | 70 |
| 43 | 13 |
| 44 | 1 |
| 45 | -256 |
| 46 | -768 |
| 47 | -768 |
| 48 | 0 |
| 49 | 672 |
| 50 | 672 |
| 51 | 336 |
| 52 | 96 |
| 53 | 15 |
| 54 | 1 |
| 55 | -512 |
| 56 | -1792 |
| 57 | -2304 |
| 58 | -768 |
| 59 | 1344 |
| 60 | 2016 |
| 61 | 1344 |
| 62 | 528 |
| 63 | 126 |
| 64 | 17 |
| 65 | 1 |