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

%I #12 Oct 27 2023 18:31:24

%S 2,0,1,2,2,2,2,2,5,4,5,8,31,64,83,66,60,104,158,240,846,2990,6296,

%T 8440,10213,14034,16843,15538,20339,57766,202098,751354,2575608,

%U 6730882,12332861,15945860,15602393,13432584,12250132,12687426,23661609,144529800

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

%H Alois P. Heinz, <a href="/A254212/b254212.txt">Table of n, a(n) for n = 1..300</a> (first 51 terms from R. H. Hardin)

%e All solutions for n=4:

%e ..4....1

%e ..2....3

%e ..3....2

%e ..1....4

%Y Column k=2 of A254218.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 26 2015