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 | 4 |
| 4 | -3 |
| 5 | 4 |
| 6 | 4 |
| 7 | 8 |
| 8 | 1 |
| 9 | 10 |
| 10 | -12 |
| 11 | 12 |
| 12 | -12 |
| 13 | 6 |
| 14 | 8 |
| 15 | 16 |
| 16 | 17 |
| 17 | 6 |
| 18 | 10 |
| 19 | 20 |
| 20 | -12 |
| 21 | 32 |
| 22 | 12 |
| 23 | 24 |
| 24 | 4 |
| 25 | -24 |
| 26 | -30 |
| 27 | 28 |
| 28 | -24 |
| 29 | 8 |
| 30 | -48 |
| 31 | 32 |
| 32 | 1 |
| 33 | 48 |
| 34 | -38 |
| 35 | 32 |
| 36 | -30 |
| 37 | 8 |
| 38 | 20 |
| 39 | 24 |
| 40 | 68 |
| 41 | 10 |
| 42 | 32 |
| 43 | 44 |
| 44 | -36 |
| 45 | 40 |
| 46 | 24 |
| 47 | 48 |
| 48 | 68 |
| 49 | 50 |
| 50 | -40 |
| 51 | 24 |
| 52 | -18 |
| 53 | 10 |
| 54 | 28 |
| 55 | 48 |
| 56 | 8 |
| 57 | 80 |
| 58 | -64 |
| 59 | 60 |
| 60 | -48 |
| 61 | 12 |
| 62 | 32 |
| 63 | 80 |
| 64 | -63 |
| 65 | -120 |