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Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1231.
0

%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