Number of U-functions for a periodic sequence?

Let \a = (a_1,a_2,...) \in {0,1,2}^\N be a 3m-periodic sequence (i.e., a_{j+3m}=a_j for all j\in\N).  ASSUME that # {1 \le r \le 3m : a_r = i}=m for i=0,1, and 2 (i.e. the 0's, 1's, and 2's appear...

12 December 2015 3,488 1 View