A254536 - OEIS

%I #4 Feb 01 2015 09:38:46

%S 3,11,49,222,1087,5604,29038,150268,764508,3857845,19929265,106104895,

%T 569770022,3029774261,15881356126,82383422858,426844152225,

%U 2236312098278,11968665825174,65501399826033,362497354225241,1992577785640176

%N Number of length n 1..(5+2) arrays with no leading partial sum equal to a prime

%C Column 5 of A254539

%H R. H. Hardin, <a href="/A254536/b254536.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..6....6....1....4....4....6....4....4....4....1....6....4....1....1....4....6

%e ..4....4....7....5....6....3....4....6....4....5....4....5....7....7....2....3

%e ..6....4....7....6....5....5....7....5....7....2....4....1....4....1....6....6

%e ..6....6....7....1....3....7....5....6....6....7....1....6....4....5....4....7

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 01 2015