login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A280815 a(n) = A049502(cototient(n)). 2

%I

%S 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,0,3,0,0,1,2,

%T 2,0,0,3,0,0,0,0,0,0,4,0,0,0,0,0,2,0,0,3,0,0,4,0,0,4,0,0,2,0,1,4,0,3,

%U 1,4,0,0,0,3,2,4,1,3,0,0,2,6,0,0,4,4,0,0,0,2,2,0,1,0,3,0,0,0,3,0,0,3,0,0,1,3,0,4,0

%N a(n) = A049502(cototient(n)).

%C a(n) = major index (2nd definition) of cototient(n), where cototient(n) = n - phi(n).

%H Indranil Ghosh, <a href="/A280815/b280815.txt">Table of n, a(n) for n = 1..10000</a>

%H Indranil Ghosh, <a href="/A280815/a280815.txt">Python Program to generate the sequence</a>

%F a(n) = A049502(A051953(n)).

%e For n = 30, cototient(n) = 22 and major index (2nd definition) of 22 is 3. So, a(n) = 3.

%Y Cf. A049502, A051953, A280726, A280799, A280800.

%K nonn

%O 1,30

%A _Indranil Ghosh_, Jan 08 2017

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 20 09:21 EDT 2021. Contains 343125 sequences. (Running on oeis4.)