%I A046657
%S A046657 1,2,3,5,6,9,11,14,16,21,23,29,32,36,40,48,51,60,64,70,75,86,90,
%T A046657 100,106,115,121,135,139,154,162,172,180,192,198,216,225,237,245,
%U A046657 265,271,292,302,314,325,348,356,377,387,403,415,441,450,470,482
%N A046657 A002088/2.
%C A046657 a(n) = |{(x,y) : 1<=x<=y<=n, x+y<=n, 1 = gcd(x,y)}| = |{(x,y) : 1<=x<=y<=n, 
               x+y>n, 1 = gcd(x,y)}|. - Steven Butler (sbutler(AT)math.ucsd.edu), 
               Mar 31 2006
%Y A046657 Partial sums of A023022.
%Y A046657 Sequence in context: A026168 A113238 A104214 this_sequence A102825 A070991 
               A008747
%Y A046657 Adjacent sequences: A046654 A046655 A046656 this_sequence A046658 A046659 
               A046660
%K A046657 nonn
%O A046657 2,2
%A A046657 N. J. A. Sloane (njas(AT)research.att.com).