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 A107892 Index of first occurrence of n-th prime in A001203, the continued fraction for Pi. 3
 9, 1, 40, 2, 276, 28, 647, 140, 203, 243, 878, 784, 754, 492, 825, 1547, 907, 868, 1789, 9215, 898, 6222, 9131, 4829, 1516, 6700, 22640, 872, 11170, 3204, 223, 10387, 8299, 30086, 31079, 12637, 8486, 20644, 8451, 53069, 32093, 16297, 20276, 1002, 21264 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 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 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 947040th place, thus A107892(200)=947040. LINKS M. F. Hasler (using data from H. Havermann), Table of n, a(n) for n=1,...,445. FORMULA A107892(n) = A032523(A000040(n)) = min { k | A001203(k)=A000040(n) }. - M. F. Hasler, Mar 31 2008 CROSSREFS Cf. A032523: first occurrence of n in A001203. Cf. A138758, A138759. Sequence in context: A276634 A050312 A295575 * A283043 A283016 A050303 Adjacent sequences:  A107889 A107890 A107891 * A107893 A107894 A107895 KEYWORD nonn AUTHOR Zak Seidov, May 25 2005 EXTENSIONS Edited by M. F. Hasler, Mar 31 2008 STATUS approved

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Last modified April 19 04:19 EDT 2019. Contains 322237 sequences. (Running on oeis4.)