“Extra” step in counting the number of ways to have a domino tiling of a 4 by n rectangle?












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enter image description here



The picture above explains a method for doing this via generating functions & finite state machines, but what I do not get is why we must record the number of dominoes used to make a state transition. Why does the number of transitions alone suffice? Why is it that we need $mt^b$ to record a transition instead of just $m$?










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    enter image description here



    The picture above explains a method for doing this via generating functions & finite state machines, but what I do not get is why we must record the number of dominoes used to make a state transition. Why does the number of transitions alone suffice? Why is it that we need $mt^b$ to record a transition instead of just $m$?










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      enter image description here



      The picture above explains a method for doing this via generating functions & finite state machines, but what I do not get is why we must record the number of dominoes used to make a state transition. Why does the number of transitions alone suffice? Why is it that we need $mt^b$ to record a transition instead of just $m$?










      share|cite|improve this question













      enter image description here



      The picture above explains a method for doing this via generating functions & finite state machines, but what I do not get is why we must record the number of dominoes used to make a state transition. Why does the number of transitions alone suffice? Why is it that we need $mt^b$ to record a transition instead of just $m$?







      combinatorics generating-functions tiling transition-matrix






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      asked Dec 8 at 9:04









      Saad

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