A074406 Number of 4-ary Lyndon words of length n over Z_4 with trace 1 and subtrace 0.

1, 1, 2, 4, 8, 32, 128, 512, 1948, 6963, 24576, 87380, 317440, 1179648, 4438966, 16777216, 63409935, 239541344, 905969664, 3435973836, 13076616480, 49928994816, 191126044672, 733007751680, 2815437297416, 10828603699515, 41705086880768, 160842843834660

Offset

1,3

Comments

Same as the number of 4-ary Lyndon words of length n over Z_4 with trace 3 and subtrace 0.

Links

Table of n, a(n) for n=1..28.

Max Alekseyev, PARI/GP scripts for miscellaneous math problems

F. Ruskey, 4-ary Lyndon words with given trace and subtrace

Crossrefs

Cf. A068596, A074403, A074404, A074405, A074407, A074408, A074409, A074410, A074411, A074412, A074413.

Sequence in context: A165904 A192008 A298989 * A186340 A228920 A064378

Adjacent sequences: A074403 A074404 A074405 * A074407 A074408 A074409

Keyword

easy,nonn

Author

Frank Ruskey and Nate Kube, Aug 22 2002

Extensions

Terms a(16) onward from Max Alekseyev, Apr 09 2013

Status

approved