as exapmle 2,3,5 21:45
why we not counting square containing number as 4
taking 4 as count so all possible subsequence divisible by 4 means having gcd=4; why we not subtractiong 4 from our original answer 2^(n)-1;
as exapmle 2,3,5 21:45
why we not counting square containing number as 4
taking 4 as count so all possible subsequence divisible by 4 means having gcd=4; why we not subtractiong 4 from our original answer 2^(n)-1;