Search: id:A072398
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%I A072398
%S A072398 3,22,22,355,355,312689,1146408,5419351,245850922,2549491779,
%T A072398 21053343141,21053343141,1783366216531,8958937768937,139755218526789,
%U A072398 428224593349304,30246273033735921,66627445592888887
%N A072398 Numerator of best approximation to Pi with denominator <= 10^n.
%e A072398 A072398(5) = 312689 because A072398(5)/A072399(5) = 312689/99532 is the 
               best rational approximation to Pi with positive denominator <= 10^5 
               = 100000. This approximation is accurate to 0.00000000092766%.
%o A072398 (PARI) for(n=0,40,print1(numerator(bestappr(Pi,10^n)),",")) (Finds these 
               approximations very quickly.)
%Y A072398 Cf. A072399 (denominators), A000796 (Pi), A068089, A002485/A002486.
%Y A072398 Sequence in context: A122495 A100977 A037101 this_sequence A134924 A154317 
               A042547
%Y A072398 Adjacent sequences: A072395 A072396 A072397 this_sequence A072399 A072400 
               A072401
%K A072398 easy,frac,nice,nonn
%O A072398 0,1
%A A072398 Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jun 15 2002

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