C++ reverse Collatz (181 bytes)

#include<iostream>
int r(int v,int i,int t){for(int j=0;j<t-i;j++){std::cout<<". ";}std::cout<<v<<'\n';i?r(v+v--,--i,t)%(v%2*!(v%3)?v/3>1?r(v/3,i,t):v:v):v;}int main(){r(1,16,16);}