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 | 0 |
| 2 | -4 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | -8 |
| 28 | 52 |
| 29 | 36 |
| 30 | -56 |
| 31 | -4 |
| 32 | -48 |
| 33 | -64 |
| 34 | 68 |
| 35 | -24 |
| 36 | 68 |
| 37 | 52 |
| 38 | -48 |
| 39 | 36 |
| 40 | -64 |
| 41 | -64 |
| 42 | 52 |
| 43 | -64 |
| 44 | 84 |
| 45 | 52 |
| 46 | -32 |
| 47 | 84 |
| 48 | -72 |
| 49 | -48 |
| 50 | 20 |
| 51 | -104 |
| 52 | 76 |
| 53 | 36 |
| 54 | 8 |
| 55 | 124 |
| 56 | -64 |
| 57 | -32 |
| 58 | -20 |
| 59 | -144 |
| 60 | 68 |
| 61 | 20 |
| 62 | 48 |
| 63 | 164 |
| 64 | -56 |
| 65 | -16 |
| 66 | -68 |
| 67 | -168 |