%I #9 Mar 19 2014 13:03:41
%S 1,1,4,27,252,2935,40336,632870
%N Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1231.
%Y Cf. A239295.
%K nonn,more
%O 0,3
%A _Chad Brewbaker_, Mar 17 2014