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a(n) = A049820(n) - A177235(n).
1

%I #4 Mar 30 2012 17:40:23

%S 0,0,0,0,1,0,1,1,2,1,2,1,4,3,2,2,5,3,5,4,5,4,5,4,8,7,6,5,8,5,8,8,10,9,

%T 8,6,11,10,9,8,13,10,13,12,11,10,11,10,16,14,14,13,16,13,14,13,16,15,

%U 16,13,20,19,16,16,19,16,19,18,19,16,19,17,25,24,21,20,21,18,21,20,24,23

%N a(n) = A049820(n) - A177235(n).

%C Number of non-divisors k of n, 1<k<n, for which floor(n/k) is even. [From _R. J. Mathar_, May 24 2010]

%Y Cf. A000005, A049820, A177235

%K nonn

%O 1,9

%A _Omar E. Pol_, May 23 2010

%E Terms from a(16) onwards from _R. J. Mathar_, May 24 2010