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A239376
Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1223.
0
1, 1, 4, 27, 252, 2935, 40330, 632352, 11070192, 213109881, 4460816992, 100651469996, 2431215093846, 62514061904580, 1703115911340272, 48965931282533948, 1480607510447121328, 46944740372499336665
OFFSET
0,3
CROSSREFS
Cf. A239295.
Sequence in context: A246526 A273994 A239378 * A239373 A239377 A239371
KEYWORD
nonn,more
AUTHOR
Chad Brewbaker, Mar 17 2014
EXTENSIONS
a(8)-a(17) from Alois P. Heinz, Mar 19 2014
STATUS
approved