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 | 0 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | -4 |
| 5 | 3 |
| 6 | -4 |
| 7 | 5 |
| 8 | -16 |
| 9 | -3 |
| 10 | -4 |
| 11 | 9 |
| 12 | -20 |
| 13 | 11 |
| 14 | -4 |
| 15 | -1 |
| 16 | -48 |
| 17 | 15 |
| 18 | -24 |
| 19 | 17 |
| 20 | -28 |
| 21 | 1 |
| 22 | -4 |
| 23 | 21 |
| 24 | -64 |
| 25 | 5 |
| 26 | -4 |
| 27 | -27 |
| 28 | -36 |
| 29 | 27 |
| 30 | -32 |
| 31 | 29 |
| 32 | -128 |
| 33 | 5 |
| 34 | -4 |
| 35 | 11 |
| 36 | -84 |
| 37 | 35 |
| 38 | -4 |
| 39 | 7 |
| 40 | -96 |
| 41 | 39 |
| 42 | -40 |
| 43 | 41 |
| 44 | -52 |
| 45 | -33 |
| 46 | -4 |
| 47 | 45 |
| 48 | -176 |
| 49 | 21 |
| 50 | -40 |
| 51 | 11 |
| 52 | -60 |
| 53 | 51 |
| 54 | -108 |
| 55 | 23 |
| 56 | -128 |
| 57 | 13 |
| 58 | -4 |
| 59 | 57 |
| 60 | -124 |
| 61 | 59 |
| 62 | -4 |
| 63 | -39 |
| 64 | -320 |
| 65 | 29 |
| 66 | -56 |
| 67 | 65 |
| 68 | -76 |
| 69 | 17 |
| 70 | -48 |
| 71 | 69 |
| 72 | -240 |
| 73 | 71 |