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!)
A294896 a(n) = gcd(A000203(n), A005187(n)). 4

%I #9 Nov 27 2017 12:43:05

%S 1,3,4,7,2,2,1,15,1,18,1,2,1,1,2,31,2,1,5,2,1,1,6,2,1,7,10,1,6,8,1,63,

%T 16,6,1,7,1,1,2,6,1,3,2,1,2,8,1,2,19,1,2,1,6,8,3,1,10,2,1,4,1,1,8,127,

%U 4,2,1,2,3,1,6,1,1,1,2,1,6,8,1,2,1,7,6,1,2,12,1,1,6,2,1,12,1,3,8,2,1,1,2,1,6,8,1,5,2

%N a(n) = gcd(A000203(n), A005187(n)).

%H Antti Karttunen, <a href="/A294896/b294896.txt">Table of n, a(n) for n = 1..16384</a>

%F a(n) = gcd(A000203(n), A005187(n)).

%F a(n) = gcd(A000203(n),abs(A294898(n))) = gcd(A005187(n),abs(A294898(n))), where A294898(n) = A005187(n) - A000203(n).

%F a(n) = A000203(n)/A295655(n) = A005187(n)/A295656(n).

%t Array[GCD[DivisorSigma[1, #], IntegerExponent[(2 #)!, 2]] &, 105] (* _Michael De Vlieger_, Nov 26 2017 *)

%o (Scheme) (define (A294896 n) (gcd (A000203 n) (A005187 n)))

%Y Cf. A000203, A005187, A294898, A294899, A295655, A295656.

%K nonn

%O 1,2

%A _Antti Karttunen_, Nov 25 2017

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 20 05:55 EDT 2024. Contains 371799 sequences. (Running on oeis4.)