A074407 Number of 4-ary Lyndon words of length n over Z_4 with trace 1 and subtrace 1.

0, 0, 0, 4, 16, 53, 169, 512, 1706, 6144, 23040, 87380, 327680, 1217097, 4509419, 16777216, 62914560, 237677216, 902430720, 3435973836, 13102206738, 50026607709, 191312873561, 733007751680, 2814062572336, 10823317585920, 41694904974720, 160842843834660

Offset

1,4

Comments

Same as the number of 4-ary Lyndon words of length n over Z_4 with trace 3 and subtrace 1.

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, A074408, A074409, A074410, A074411, A074412, A074413.

Sequence in context: A223711 A074409 A056589 * A192074 A293884 A121159

Adjacent sequences: A074404 A074405 A074406 * A074408 A074409 A074410

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