%I
%S 1,1,1,2,4,6,11,20,33,62,135,317,692,1345,2651,5741,12576,25825,49270,
%T 90118,168115,340003,751400,1741713,4057301,9232683,20184851,42473752,
%U 87925348,183030469,382853596,790870128,1597901060,3189861839,6430641490
%N Number of length n 1..(1+2) arrays with no leading partial sum equal to a prime
%C Column 1 of A254539
%H R. H. Hardin, <a href="/A254532/b254532.txt">Table of n, a(n) for n = 1..210</a>
%e All solutions for n=4
%e ..1....1
%e ..3....3
%e ..2....2
%e ..2....3
%K nonn
%O 1,4
%A _R. H. Hardin_, Feb 01 2015
