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 | -1 |
| 4 | 4 |
| 5 | -2 |
| 6 | 6 |
| 7 | -3 |
| 8 | 16 |
| 9 | -1 |
| 10 | 20 |
| 11 | -5 |
| 12 | 24 |
| 13 | -6 |
| 14 | 42 |
| 15 | 4 |
| 16 | 64 |
| 17 | -8 |
| 18 | 54 |
| 19 | -9 |
| 20 | 80 |
| 21 | 6 |
| 22 | 110 |
| 23 | -11 |
| 24 | 96 |
| 25 | -2 |
| 26 | 156 |
| 27 | -1 |
| 28 | 168 |
| 29 | -14 |
| 30 | 120 |
| 31 | -15 |
| 32 | 256 |
| 33 | 10 |
| 34 | 272 |
| 35 | 12 |
| 36 | 216 |
| 37 | -18 |
| 38 | 342 |
| 39 | 12 |
| 40 | 320 |
| 41 | -20 |
| 42 | 252 |
| 43 | -21 |
| 44 | 440 |
| 45 | 4 |
| 46 | 506 |
| 47 | -23 |
| 48 | 384 |
| 49 | -3 |
| 50 | 500 |
| 51 | 16 |
| 52 | 624 |
| 53 | -26 |
| 54 | 486 |
| 55 | 20 |
| 56 | 672 |
| 57 | 18 |
| 58 | 812 |
| 59 | -29 |
| 60 | 480 |
| 61 | -30 |
| 62 | 930 |
| 63 | 6 |
| 64 | 1024 |
| 65 | 24 |