JavaScript Short 4-Liner Simple Solution
javascript\nvar concatenatedBinary = function(n) {\n    let num = 0;\n    \n    for(let i = 1; i <= n; i++) {\n        //OR num *= (1 << i.toString(2).length)\n
```javascript\nvar concatenatedBinary = function(n) {\n    let num = 0;\n    \n    for(let i = 1; i <= n; i++) {\n        //OR num *= (1 << i.toString(2).length)\n        num *= (2 ** i.toString(2).length) \n        num += i;\n        num %= (10 ** 9 + 7)\n    }\n    return num;\n};\n```
['Bit Manipulation', 'JavaScript']