Sum :$1+ 1/2 +1/3 +1/4 + 1/6 +1/8 \cdots $ , terms are reciprocals of the positive integers whose prime factors are $2$'s and $3$'s.
What is the sum of this? $ 1 + \frac12 + \frac13 + \frac14 + \frac16 + \frac18 + \frac19 + \frac1{12} +\cdots$