title: How to feed only half of the RNN output to next RNN output layer in tensorflow?
body: <p>I want to feed only RNN output at odd positions to the next RNN layer. How to achieve that in tensorflow?</p>
  
  <p>I basically want to build the top layer in the following diagram, which halves the sequence size. The bottom layer is just a simple RNN.</p>
  
  <p><a href="https://i.stack.imgur.com/tCq2y.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tCq2y.png" alt="enter image description here"></a></p>