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avatar+2551 

How many binary (zeros and ones) sequences of 0s and 1s of length 19 are there that begin with a 0, end with a 0, contain no two consecutive 0s, and contain no three consecutive 1s???

 Apr 9, 2019
 #1
avatar+2551 
+1

This might be a VERY HARD permutations question

 Apr 12, 2019

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