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a(n) = A091255(n, sigma(n)).
8

%I #8 May 21 2019 22:03:19

%S 1,1,1,1,3,6,1,1,1,6,1,4,1,2,3,1,3,3,1,2,1,2,3,12,1,2,5,28,3,6,1,1,3,

%T 10,1,1,1,2,1,10,1,2,1,4,5,6,1,4,1,1,3,2,3,10,1,8,5,6,1,4,1,2,1,1,21,

%U 6,1,6,1,14,3,9,1,2,1,4,3,2,1,2,1,2,7,28,5,6,1,4,3,2,1,4,1,2,5,12,1,1,5,1,3,10,1,2,3

%N a(n) = A091255(n, sigma(n)).

%H Antti Karttunen, <a href="/A325634/b325634.txt">Table of n, a(n) for n = 1..65537</a>

%H <a href="/index/Ge#GF2X">Index entries for sequences related to polynomials in ring GF(2)[X]</a>

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

%F a(n) = A091255(n, A000203(n)).

%F a(n) = A091255(n, A169813(n)) = A091255(A000203(n), A169813(n)).

%o (PARI)

%o A091255sq(a,b) = fromdigits(Vec(lift(gcd(Pol(binary(a))*Mod(1, 2),Pol(binary(b))*Mod(1, 2)))),2);

%o A325634(n) = A091255sq(n, sigma(n));

%Y Cf. A000203, A009194, A091255, A169813, A325632, A325633, A325635, A325639 (fixed points, n such that a(n) = n).

%K nonn

%O 1,5

%A _Antti Karttunen_, May 21 2019