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%I #4 Feb 01 2015 09:38:00
%S 3,10,40,160,670,3001,13503,60408,270370,1192385,5221700,23404787,
%T 108379668,507618711,2353392292,10735523052,48337299889,216062343583,
%U 966793284879,4375808357962,20209591137998,95483805098650
%N Number of length n 1..(4+2) arrays with no leading partial sum equal to a prime
%C Column 4 of A254539
%H R. H. Hardin, <a href="/A254535/b254535.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..4....6....4....1....1....6....4....6....4....1....4....1....1....6....6....4
%e ..2....3....2....5....5....6....6....3....2....5....6....3....3....6....2....5
%e ..2....5....3....3....2....3....5....5....3....2....2....4....6....6....4....6
%e ..4....4....1....3....1....5....5....1....3....4....2....2....6....2....6....6
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 01 2015