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!)
A346240 Difference between A341512 and its Möbius transform. 3

%I #9 Aug 27 2021 05:31:31

%S 0,0,0,1,0,3,0,11,2,3,0,46,0,5,4,85,0,80,0,68,6,3,0,398,2,5,46,130,0,

%T 209,0,575,4,3,6,981,0,5,6,640,0,397,0,182,164,7,0,2830,4,150,4,280,0,

%U 1435,4,1250,6,3,0,2586,0,7,292,3661,6,551,0,368,8,507,0,7983,0,5,212,502,6,847,0,4700,788,3,0,5078,4,5,4,1894

%N Difference between A341512 and its Möbius transform.

%H Antti Karttunen, <a href="/A346240/b346240.txt">Table of n, a(n) for n = 1..16384</a>

%H <a href="/index/Pri#prime_indices">Index entries for sequences computed from indices in prime factorization</a>

%H <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a>

%F a(n) = -Sum_{d|n, d<n} A008683(n/d) * A341512(d).

%F a(n) = A341512(n) - A346239(n).

%o (PARI)

%o A003961(n) = { my(f=factor(n)); for (i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); factorback(f); }; \\ From A003961

%o A341528(n) = (n*sigma(A003961(n)));

%o A341529(n) = (sigma(n)*A003961(n));

%o A341512(n) = (A341529(n)-A341528(n));

%o A346240(n) = -sumdiv(n,d,(d<n)*moebius(n/d)*A341512(d));

%Y Cf. A000203, A003961, A008683, A341528, A341529, A341512, A346239.

%Y Cf. also A347097.

%K nonn,look

%O 1,6

%A _Antti Karttunen_, Jul 13 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 April 24 11:19 EDT 2024. Contains 371936 sequences. (Running on oeis4.)