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A239377
Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1231.
0
1, 1, 4, 27, 252, 2935, 40336, 632870
OFFSET
0,3
CROSSREFS
Cf. A239295.
Sequence in context: A239378 A239376 A239373 * A239371 A201996 A239368
KEYWORD
nonn,more
AUTHOR
Chad Brewbaker, Mar 17 2014
STATUS
approved