A074412 Number of 4-ary Lyndon words of length n over Z_4 with trace 2 and subtrace 2.

0, 0, 0, 0, 8, 40, 160, 576, 1920, 6528, 23040, 84480, 317440, 1198080, 4508328, 16908288, 63406080, 238605640, 902430720, 3429236736, 13076616480, 49977753600, 191312691200, 733365665600, 2815436626328, 10825959997440, 41694904974720, 160823204904960

Offset

1,5

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, A074411, A074413.

Sequence in context: A004405 A284286 A001789 * A364619 A217375 A113071

Adjacent sequences: A074409 A074410 A074411 * A074413 A074414 A074415

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