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!)
A345901 a(n) is the largest k such that the tribonacci word A080843 contains a block of length k*n that is an abelian k-th power. 0

%I #9 Jul 01 2021 16:11:11

%S 2,2,2,3,2,4,5,2,2,2,4,2,8,2,2,2,4,3,2,6,2,2,2,8,2,4,3,2,2,3,6,2,3,2,

%T 2,2,10,3,2,3,3,3,3,13,2,2,2,4,2,5,4,2,2,2,5,2,6,2,2,2,6,3,3,4,2,2,2,

%U 12,2,3,2,2,2,5,5,2,3,2,3,2,21,2,2,2,4,3

%N a(n) is the largest k such that the tribonacci word A080843 contains a block of length k*n that is an abelian k-th power.

%C An abelian k-th power consists of k blocks x_1 x_2 ... x_k such that each x_i is a permutation of x_1. For example, the English word "deeded" is an abelian 3rd power.

%e For n=4, A080843 contains the block 2010.0102.0102, which is an abelian 3rd power. But no blocks of size 16 in A080843 are abelian 4th powers.

%Y Cf. A080843.

%K nonn

%O 1,1

%A _Jeffrey Shallit_, Jun 29 2021

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 August 19 13:17 EDT 2024. Contains 375302 sequences. (Running on oeis4.)