login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A056420 Number of primitive (period n) step cyclic shifted sequences using a maximum of three different symbols. 2

%I

%S 3,3,7,15,21,79,75,306,433,1605,1695,12662,10461,57759,122791,347895,

%T 476049,3596917,3401967,22005312,41597289,142675887,186077883,

%U 1476684552,1694657979,8147271993,15690973311

%N Number of primitive (period n) step cyclic shifted sequences using a maximum of three different symbols.

%C See A056371 for an explanation of step shifts. Under step cyclic shifts, abcde, bdace, bcdea, cdeab and daceb etc. are equivalent.

%D M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2]

%F Sum mu(d)*A056411(n/d) where d|n.

%K nonn

%O 1,1

%A _Marks R. Nester_

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 5 03:48 EST 2023. Contains 360082 sequences. (Running on oeis4.)