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%I #7 Aug 28 2018 15:58:39
%S 0,1,0,2,0,3,0,4,2,5,0,6,0,7,0,8,0,9,0,10,6,11,0,12,4,13,0,14,0,15,0,
%T 16,2,17,4,18,0,19,8,20,0,21,0,22,14,23,0,24,2,25,0,26,0,27,8,28,2,29,
%U 0,30,0,31,0,32,4,33,0,34,6,35,0,36,0,37,16,38,2,39,0,40,18,41,0,42,0,43,24,44,0,45,12,46,30,47,0,48,0,49,0,50,0,51,0
%N a(n) = A032742(n) AND n-A032742(n), where AND is bitwise-and (A004198) and A032742 = the largest proper divisor of n.
%H Antti Karttunen, <a href="/A318518/b318518.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>
%F a(n) = A004198(A032742(n), A060681(n)).
%F a(n) = n - A318516(n) = (n - A318517(n))/2.
%o (PARI)
%o A032742(n) = if(1==n,n,n/vecmin(factor(n)[,1]));
%o A318518(n) = bitand(A032742(n),n-A032742(n));
%Y Cf. A004198, A032742, A060681, A318515, A318516, A318517.
%Y Cf. also A318508.
%K nonn,base
%O 1,4
%A _Antti Karttunen_, Aug 28 2018