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!)
A065884 a(n) = A065824(A047845(n+1)). 0

%I #7 Sep 17 2023 21:36:29

%S 323,899,1763,5249,3239,979801,5459,10763,9179,9701,10403,12319,

%T 5646547,24569,19109,19043,22499,50819,41309,32639,46979,34579,39059,

%U 125969,49769,49949,154559,48554797,114953,52532203,56624063,195499,75077,79799,72899

%N a(n) = A065824(A047845(n+1)).

%C By definition (m+1)*phi(a(n)) = m*sigma(a(n)) where m=A065824(n+1).

%e A065824(4) = 323, so a(1) = A065824[A047845(1+1)] = 323 A065824(16) = 979801 and a(6) = 979801 = A065824[A047845(1+6)]

%Y Cf. A065824, A047845, A000010, A000203.

%K nonn

%O 1,1

%A _Labos Elemer_, Nov 27 2001

%E Name corrected and more terms from _Sean A. Irvine_, Sep 17 2023

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 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)