Search: id:A014200
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%I A014200
%S A014200 0,1,2,2,3,5,5,5,6,7,9,9,9,11,11,11,12,14,15,15,17,17,17,
%T A014200 17,17,20,22,22,22,24,24,24,25,25,27,27,28,30,30,30,32,
%U A014200 34,34,34,34,36,36,36,36,37,40,40,42,44,44,44,44,44,46
%N A014200 Number of solutions to x^2+y^2 <= n, excluding (0,0), divided by 4.
%F A014200 lim a(n)/n = pi/4
%F A014200 a(n) = n - [n/3] + [n/5] - [n/7] + [n/9] - [n/11] + ... - Yuval Dekel 
               (dekelyuval(AT)hotmail.com), Aug 28 2003
%Y A014200 A014198/4.
%Y A014200 Cf. A059851.
%Y A014200 Sequence in context: A055769 A162217 A123575 this_sequence A140200 A029039 
               A131429
%Y A014200 Adjacent sequences: A014197 A014198 A014199 this_sequence A014201 A014202 
               A014203
%K A014200 nonn
%O A014200 0,3
%A A014200 N. J. A. Sloane (njas(AT)research.att.com).

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