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!)
A300830 a(n) = Product_{d|n} A019565(d)^(1-A008966(n/d)). 5

%I #6 Mar 19 2018 22:14:40

%S 1,1,1,2,1,1,1,6,2,1,1,12,1,1,1,30,1,6,1,20,1,1,1,540,2,1,12,60,1,1,1,

%T 210,1,1,1,2520,1,1,1,1260,1,1,1,84,20,1,1,94500,2,6,1,140,1,540,1,

%U 18900,1,1,1,25200,1,1,60,2310,1,1,1,44,1,1,1,8731800,1,1,12,132,1,1,1,346500,168,1,1,39600,1,1,1,41580,1,1260

%N a(n) = Product_{d|n} A019565(d)^(1-A008966(n/d)).

%H Antti Karttunen, <a href="/A300830/b300830.txt">Table of n, a(n) for n = 1..8192</a>

%F a(n) = Product_{d|n} A019565(d)^(1-abs(A008683(n/d))).

%F a(n) = A293214(n) / (A300831(n)*A300832(n)).

%o (PARI)

%o A019565(n) = {my(j,v); factorback(Mat(vector(if(n, #n=vecextract(binary(n), "-1..1")), j, [prime(j), n[j]])~))}; \\ From A019565

%o A300830(n) = { my(m=1); fordiv(n,d,if(!moebius(n/d),m *= A019565(d))); m; };

%Y Cf. A008683, A008966, A019565.

%Y Cf. also A293214, A300831, A300832, A300833.

%K nonn

%O 1,4

%A _Antti Karttunen_, Mar 16 2018

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 September 7 08:55 EDT 2024. Contains 375730 sequences. (Running on oeis4.)