I think it’s a good attitude to serve as a stepping stone away from bigotry, it appeals to the bigots by offering some common ground while giving them a path to becoming less outwardly bigoted. Social progress takes time, especially with attitudes engrained as much as homophobia used to be.
I think you have to include 2^0 for that to be true?
e.g 2^0 = 1, 2^1 = 2 2^0 + 2^1 = 1 + 2 = 3, 2^2 = 4 … 7, 8 15,16 31, 32 etc.