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%I #10 Oct 02 2023 16:22:47
%S 7,28,112,448,1813,7322,29536,119066,479993,1935168,7802161,31456852,
%T 126827111,511338342,2061602939,8311924900,33511832745,135112262286,
%U 544742594039,2196280995578,8854916583356,35701054472646,143938712300001
%N Number of 0..6 arrays x(0..n-1) of n elements with each no smaller than the sum of its three previous neighbors modulo 7.
%H R. H. Hardin, <a href="/A200666/b200666.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=6:
%e ..1....3....1....4....0....4....4....2....5....4....1....2....1....4....0....2
%e ..6....4....3....6....4....6....4....5....5....6....1....3....4....6....0....5
%e ..1....4....4....3....5....3....4....1....5....4....5....6....6....4....3....0
%e ..6....6....2....6....5....6....6....1....4....0....4....5....4....6....6....4
%e ..6....6....2....1....6....5....4....4....6....5....6....5....0....5....2....6
%e ..6....3....5....5....2....1....5....6....6....5....6....5....5....6....5....6
%Y Column 6 of A200668.
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 20 2011
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