a(1)=1, a(2)=2; thereafter, denoting x=a(n-1)+a(n-2), we have a(n)=3x+1 if x is odd, otherwise a(n)=x/2^m where 2^m is the maximal power of 2 dividing x.

A276486

a(1)=1, a(2)=2; thereafter, denoting x=a(n-1)+a(n-2), we have a(n)=3x+1 if x is odd, otherwise a(n)=x/2^m where 2^m is the maximal power of 2 dividing x.