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A239373
Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1213.
0
1, 1, 4, 27, 252, 2935, 40330, 632408
OFFSET
0,3
CROSSREFS
Cf. A239295.
Sequence in context: A273994 A239378 A239376 * A239377 A239371 A201996
KEYWORD
nonn,more
AUTHOR
Chad Brewbaker, Mar 17 2014
STATUS
approved