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%I #5 Feb 23 2016 12:02:06
%S 0,0,1,3199,16140983,142951955371,2169397142273171,
%T 54391509124298646609,2179159866745975811590271,
%U 135383475007869462606521105767,12672963300072129619006691134123819,1737368296284036324230735297513232295869
%N Number of sequences with 4 copies each of 1,2,...,n avoiding the pattern 12...n.
%H Alois P. Heinz, <a href="/A269114/b269114.txt">Table of n, a(n) for n = 0..100</a>
%F a(n) = A014608(n) - A268847(n).
%Y Column k=4 of A269129.
%Y Cf. A014608, A268847.
%K nonn
%O 0,4
%A _Alois P. Heinz_, Feb 19 2016
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