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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 2 |
| 7 | 2 |
| 8 | 2 |
| 9 | 3 |
| 10 | -11 |
| 11 | 2 |
| 12 | 1626 |
| 13 | 2 |
| 14 | 3 |
| 15 | 3 |
| 16 | 3 |
| 17 | 16 |
| 18 | 15584139827 |
| 19 | 3 |
| 20 | 3 |
| 21 | 3 |
| 22 | 3 |
| 23 | 3 |
| 24 | 2220422932 |
| 25 | 8866128975287528 |
| 26 | 3 |
| 27 | 3 |
| 28 | 3 |
| 29 | 4 |
| 30 | 4 |
| 31 | -159380 |
| 32 | -80538738812075974 |
| 33 | 3 |
| 34 | 8 |
| 35 | 4 |
| 36 | 3 |
| 37 | -8 |
| 38 | 31 |
| 39 | -796 |
| 40 | -61922712865 |
| 41 | 3 |
| 42 | 12 |
| 43 | 3 |
| 44 | 22 |
| 45 | 4 |
| 46 | 5 |
| 47 | 5 |
| 48 | 3 |
| 49 | 4 |
| 50 | 4 |
| 51 | 4 |
| 52 | 4 |
| 53 | 5 |
| 54 | -21 |
| 55 | 4 |
| 56 | -10 |
| 57 | 4 |