%I A121502
%S A121502 3,4,5,6,8,10,11,12,13,15,22,27,34,46,58,63,70,75,87,128,157,198
%N A121502 Companion sequence for A121501 used in a unit circle area approximation 
               problem.
%C A121502 The pairs (n(k),m(k)):=(A121501(k),a(k)), k>=1, lead to a strictly decreasing 
               sequence of relative errors E(n(k),m(k)) in the circle area approximation 
               problem described in A121500. For each k=1,2,... the unit circle 
               has inscribed n(k)-gon and circumscribed m(k)-gon.
%C A121502 For the sequence of relative errors E(n(k),m(k)), k=1..20 see the W. 
               Lang link in A121501.
%F A121502 a(k)= A121500(A121501(k)),k>=1.
%e A121502 (n(k),m(k)) pairs (A121501(k),a(k)), k=1..7: [3, 3], [5, 4], [6,
%e A121502 5], [8, 6], [11, 8], [14, 10], [15, 11],...
%Y A121502 Sequence in context: A098171 A039031 A047309 this_sequence A108943 A163406 
               A092253
%Y A121502 Adjacent sequences: A121499 A121500 A121501 this_sequence A121503 A121504 
               A121505
%K A121502 nonn,more
%O A121502 1,1
%A A121502 Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Aug 16 
               2006