Search: id:A107892
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%I A107892
%S A107892 9,1,40,2,276,28,647,140,203,243,878,784,754,492,825,1547,907,868,1789,
%T A107892 9215,898,6222,9131,4829,1516,6700,22640,872,11170,3204,223,10387,8299,
%U A107892 30086,31079,12637,8486,20644,8451,53069,32093,16297,20276,1002,21264
%N A107892 Index of first occurrence of n-th prime in A001203, the continued fraction 
               for Pi.
%C A107892 Until it is proved that every prime does indeed occur in A001203, we 
               should tacitly understand a convention like "A107892(n) = 0 if A000040(n) 
               does not occur in A001203". - M. F. Hasler, Mar 31 2008
%C A107892 Among first 1000000 terms of the continued fraction for Pi, the first 
               absent primes have indices 129, 132, 137, 146, 147, 158, 160, 165, 
               170, 172, 175, 180, 182, 184, 189, 193, 197, 198, 199. The 200th 
               prime is in the 947040-th place, thus A107892(200)=947040.
%H A107892 M. F. Hasler (using data from H. Havermann), <a href="b107892.txt">Table 
               of n, a(n) for n=1,...,445</a>.
%F A107892 A107892(n) = A032523(A000040(n)) = min { k | A001203(k)=A000040(n) }. 
               - M. F. Hasler, Mar 31 2008
%Y A107892 Cf. A032523: first occurrence of n in A001203.
%Y A107892 Cf. A138758, A138759.
%Y A107892 Sequence in context: A092477 A019433 A050312 this_sequence A050303 A038291 
               A075504
%Y A107892 Adjacent sequences: A107889 A107890 A107891 this_sequence A107893 A107894 
               A107895
%K A107892 nonn
%O A107892 1,1
%A A107892 Zak Seidov (zakseidov(AT)yahoo.com), May 25 2005
%E A107892 Edited by M. F. Hasler (www.univ-ag.fr/~mhasler), Mar 31 2008

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