Find the number of permutations of first N natural numbers such that given conditions should be satisfied. The given conditions can be something like this
x and y not occurs consecutively
p and q not occurs consecutively
r and s not occurs consecutively
..etc
Discussion part 1 : http://openstudy.com/study#/updates/568a1e3de4b0f8b822a18485

Question

Find the number of permutations of first N natural numbers such that given conditions should be satisfied. The given conditions can be something like this 
x and y not occurs consecutively 
p and q not occurs consecutively 
r and s not occurs consecutively 
..etc
Discussion part 1 : http://openstudy.com/study#/updates/568a1e3de4b0f8b822a18485

dls · Answer

n=4 not connected ones are=> 
1, 2 
2, 3 
3, 4

dan815 · Answer

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