A239376 - OEIS

%I #10 Mar 19 2014 13:01:55

%S 1,1,4,27,252,2935,40330,632352,11070192,213109881,4460816992,

%T 100651469996,2431215093846,62514061904580,1703115911340272,

%U 48965931282533948,1480607510447121328,46944740372499336665

%N Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1223.

%Y Cf. A239295.

%K nonn,more

%O 0,3

%A _Chad Brewbaker_, Mar 17 2014

%E a(8)-a(17) from _Alois P. Heinz_, Mar 19 2014