cp's OEIS Frontend

A254224 Number of length 7 1..(n+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.

%I A254224 #6 Jul 23 2025 14:33:48
%S A254224 0,2,15,383,633,6490,18214,60168,97089,296955,420163,1046085,1799943,
%T A254224 3545675,4664339,9251052,11630683,20703803,29730723,47075466,56991009,
%U A254224 93151404,122440340,182865306,239287220,341720757,401640735,596658745
%N A254224 Number of length 7 1..(n+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.
%C A254224 Row 7 of A254218
%H A254224 R. H. Hardin, <a href="/A254224/b254224.txt">Table of n, a(n) for n = 1..67</a>
%e A254224 Some solutions for n=4
%e A254224 ..4....6....6....4....1....6....4....4....6....6....6....1....6....1....4....4
%e A254224 ..5....2....3....5....3....2....6....2....2....4....2....3....4....3....6....6
%e A254224 ..3....4....5....3....4....4....4....4....6....2....6....6....5....2....2....4
%e A254224 ..6....2....6....4....2....2....2....2....4....3....4....4....3....4....4....2
%e A254224 ..4....6....4....5....6....1....6....4....6....6....6....2....4....2....6....4
%e A254224 ..2....5....2....3....2....3....3....5....2....3....4....6....2....4....4....2
%e A254224 ..6....1....4....6....4....6....1....1....4....6....6....4....6....6....6....4
%K A254224 nonn
%O A254224 1,2
%A A254224 _R. H. Hardin_, Jan 26 2015