cp's OEIS Frontend

A254215 Number of length n 1..(5+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.

%I A254215 #6 Jan 27 2015 18:10:45
%S A254215 3,2,12,24,70,192,633,2484,10554,35054,102520,337948,1366804,6000028,
%T A254215 24951622,94266262,337342046,1263530794,5269371063,23209051416,
%U A254215 98571237345,383041820280,1353435250769,4542413798878,16490190511798,76615460665948,434914649543770
%N A254215 Number of length n 1..(5+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.
%e A254215 Some solutions for n=4:
%e A254215 ..6....6....6....4....4....1....4....1....4....4....4....4....1....6....1....6
%e A254215 ..2....2....4....6....6....5....5....5....2....2....6....2....3....4....5....4
%e A254215 ..6....7....2....4....2....3....3....6....4....6....2....3....2....6....4....2
%e A254215 ..4....1....4....6....4....1....6....4....6....4....6....1....4....4....6....6
%Y A254215 Column k=5 of A254218.
%K A254215 nonn
%O A254215 1,1
%A A254215 _R. H. Hardin_, Jan 26 2015
%E A254215 a(23)-a(27) from _Alois P. Heinz_, Jan 27 2015