Search: id:A072399
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%I A072399
%S A072399 1,7,7,113,113,99532,364913,1725033,78256779,811528438,6701487259,
%T A072399 6701487259,567663097408,2851718461558,44485467702853,136308121570117,
%U A072399 9627687726852338,21208174623389167,842468587426513207
%N A072399 Denominator of best approximation to Pi with denominator <= 10^n.
%e A072399 A072399(6) = 364913 because A072398(6)/A072399(6) = 1146408/364913 is 
               the best rational approximation to Pi with positive denominator <= 
               10^6 = 1000000. This approximation is accurate to 0.000000000051271%.
%o A072399 (PARI) for(n=0,40,print1(denominator(bestappr(Pi,10^n)),",")) (Finds 
               these approximations very quickly.)
%Y A072399 Cf. A072398 (numerators), A000796 (Pi), A068089, A002485/A002486.
%Y A072399 Sequence in context: A117860 A009201 A065240 this_sequence A001988 A099739 
               A048430
%Y A072399 Adjacent sequences: A072396 A072397 A072398 this_sequence A072400 A072401 
               A072402
%K A072399 easy,frac,nice,nonn
%O A072399 0,2
%A A072399 Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jun 15 2002

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