A239376 Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1223.

1, 1, 4, 27, 252, 2935, 40330, 632352, 11070192, 213109881, 4460816992, 100651469996, 2431215093846, 62514061904580, 1703115911340272, 48965931282533948, 1480607510447121328, 46944740372499336665

Offset

0,3

Links

Table of n, a(n) for n=0..17.

Crossrefs

Cf. A239295.

Sequence in context: A246526 A273994 A239378 * A239373 A239377 A239371

Adjacent sequences: A239373 A239374 A239375 * A239377 A239378 A239379

Keyword

nonn,more

Author

Chad Brewbaker, Mar 17 2014

Extensions

a(8)-a(17) from Alois P. Heinz, Mar 19 2014

Status

approved