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A074411 Number of 4-ary Lyndon words of length n over Z_4 with trace 2 and subtrace 1. 12
0, 0, 2, 4, 16, 36, 128, 440, 1706, 6560, 24576, 90046, 327680, 1197824, 4438966, 16645120, 62914560, 238609052, 905969664, 3442670796, 13102206738, 49977704448, 191126044672, 732649663000, 2814062572336, 10825960652800, 41705086880768, 160862475611574 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

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, A074406, A074407, A074408, A074409, A074410, A074412, A074413.

Sequence in context: A001088 A101926 A087965 * A189838 A247219 A265835

Adjacent sequences:  A074408 A074409 A074410 * A074412 A074413 A074414

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

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Last modified January 21 21:30 EST 2020. Contains 331128 sequences. (Running on oeis4.)