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 A324727 Odd numbers such that 2n is equal to A318466(n), bitor(2*n,sigma(n)), where bitor is A003986. 7

%I

%S 3,7,15,21,31,55,57,63,93,105,111,127,171,189,201,213,215,217,231,237,

%T 249,253,255,315,351,357,363,369,381,393,447,465,469,473,483,489,497,

%U 501,511,651,705,747,759,789,813,831,833,879,889,895,917,959,987,989,1001,1015,1023,1155,1365,1377,1407,1467,1491,1503,1505,1515,1533,1595

%N Odd numbers such that 2n is equal to A318466(n), bitor(2*n,sigma(n)), where bitor is A003986.

%H Antti Karttunen, <a href="/A324727/b324727.txt">Table of n, a(n) for n = 1..20000</a>

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

%H <a href="/index/O#opnseqs">Index entries for sequences where any odd perfect numbers must occur</a>

%H <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a>

%o (PARI) for(n=1,oo,if((n%2)&&((2*n)==bitor(2*n,sigma(n))),print1(n,", ")));

%Y Odd terms of A324726.

%Y Cf. A000203, A003986, A318466, A324647, A324718, A324719.

%K nonn

%O 1,1

%A _Antti Karttunen_, Mar 15 2019

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Last modified June 5 18:48 EDT 2020. Contains 334854 sequences. (Running on oeis4.)