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A239375 Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1221. 0
1, 1, 4, 27, 250, 2915, 40766, 662494 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..7.

CROSSREFS

Cf. A239295.

Sequence in context: A000699 A138423 A239372 * A239370 A239369 A246526

Adjacent sequences:  A239372 A239373 A239374 * A239376 A239377 A239378

KEYWORD

nonn,more

AUTHOR

Chad Brewbaker, Mar 17 2014

STATUS

approved

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Last modified April 10 15:15 EDT 2021. Contains 342845 sequences. (Running on oeis4.)