The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A346087 a(n) = min(A071178(n), A329348(n)). 3

%I #15 Jul 19 2021 01:25:08

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

%T 1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,2,1,1,1,1,1,1,1,1,1,2,1,1,1,1,

%U 1,1,1,2,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,3

%N a(n) = min(A071178(n), A329348(n)).

%C Each term of A345941 is a power of the greatest prime factor of n, a(n) is the exponent of that term: a(n) = A100995(A345941(n)).

%C Values 0..5 occur for the first time at n = 1, 2, 4, 108, 324, 9375.

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

%H <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a>

%H <a href="/index/Pri#primorial_numbers">Index entries for sequences related to primorial numbers</a>

%F a(n) = min(A071178(n), A329348(n)).

%F a(n) = A100995(A345941(n)).

%F For all n >= 1, A006530(n)^a(n) = A345941(n).

%o (PARI)

%o A345941(n) = gcd(n,A329044(n));

%o A346087(n) = isprimepower(A345941(n)); \\ Rest of program given in A329044.

%Y Cf. A006530, A100995, A071178, A324886, A329044, A329348, A345941, A346100.

%K nonn

%O 1,4

%A _Antti Karttunen_, Jul 07 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 May 18 04:34 EDT 2024. Contains 372618 sequences. (Running on oeis4.)