%I #6 Feb 14 2020 18:55:38
%S 0,1,2,0,2,3,3,2,0,1,3,2,1,4,4,0,1,0,2,1,5,2,4,4,0,1,3,3,3,3,5,1,5,2,
%T 5,1,2,4,3,1,1,6,4,2,1,3,5,2,0,0,3,1,2,5,3,5,4,1,4,3,1,6,3,0,2,4,2,2,
%U 6,4,3,1,1,1,2,3,6,3,4,1,0,2,2,5,3,2,5,2,1,1,4,3,7,4,5,3,1,4,2,0,2,4,3,1,7
%N a(n) = A007814(A087808(sigma(n))).
%H Antti Karttunen, <a href="/A332448/b332448.txt">Table of n, a(n) for n = 1..65537</a>
%H <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a>
%H <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a>
%F a(n) = A007814(A332224(n)) = A332447(A000203(n)) = A007814(A087808(A000203(n))).
%o (PARI)
%o A087808(n) = if(n<1, 0, if(n%2==0, 2*A087808(n/2), A087808((n-1)/2)+1));
%o A332448(n) = valuation(A087808(sigma(n)),2);
%Y Cf. A000203, A007814, A087808, A332224, A332447.
%Y Cf. A332443 (positions of zeros).
%K nonn
%O 1,3
%A _Antti Karttunen_, Feb 14 2020