start_bit_permutations: Starting value to iterate (in lexicographical order)
over all bit permutaions having l bits set to 1.
E.g.: start_bit_permutations(2) = 3 [=0..011].
Description
Starting value to iterate (in lexicographical order)
over all bit permutaions having l bits set to 1.
E.g.: start_bit_permutations(2) = 3 [=0..011].
Usage
start_bit_permutations(l)