login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A324877 Xor-Moebius transform of A324867, where A324867(n) = A156552(n) XOR (A323243(n) - A156552(n)). 5

%I

%S 0,1,3,3,7,6,15,4,3,11,31,13,63,30,6,0,127,11,255,28,11,48,511,24,27,

%T 108,4,61,1023,16,2047,24,42,208,10,20,4095,510,48,32,8191,58,16383,

%U 111,25,736,32767,56,51,9,132,211,65535,20,11,108,240,1770,131071,38,262143,3408,52,8,70,95,524287,387,762,62,1048575,44,2097151,7932,19,877,10

%N Xor-Moebius transform of A324867, where A324867(n) = A156552(n) XOR (A323243(n) - A156552(n)).

%H Antti Karttunen, <a href="/A324877/b324877.txt">Table of n, a(n) for n = 1..10000</a> (based on Hans Havermann's factorization of A156552)

%H <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</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>

%o (PARI)

%o A324867(n) = { my(k=A156552(n)); bitxor(k,(A323243(n)-k)); }; \\ Needs also code from A323243.

%o A324877(n) = { my(v=0); fordiv(n, d, if(issquarefree(n/d), v=bitxor(v, A324867(d)))); (v); };

%Y Cf. A156552, A323243, A324867, A324875.

%K nonn

%O 1,3

%A _Antti Karttunen_, Mar 18 2019

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 16 09:06 EST 2019. Contains 330020 sequences. (Running on oeis4.)