A239372 Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1212.

1, 1, 4, 27, 250, 2915, 40746, 661304

Offset

0,3

Links

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

Crossrefs

Cf. A239295.

Sequence in context: A051863 A000699 A138423 * A239375 A239370 A239369

Adjacent sequences: A239369 A239370 A239371 * A239373 A239374 A239375

Keyword

nonn,more

Author

Chad Brewbaker, Mar 17 2014

Status

approved