Search: id:A090226
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%I A090226
%S A090226 1,5,26,169,1230,9593,78499,664580,5761456,50847535,455052512,
%T A090226 4118054814,37607912019,346065536840,3204941750803,29844570422670,
%U A090226 279238341033926,2623557157654234,24739954287740861,234057667276344608
%N A090226 Least k such that prime(k) has n digits. Index of least n-digit prime.
%H A090226 C. Caldwell's Prime Pages, <a href="http://primes.utm.edu/howmany.shtml#table">
               A Table of values of pi(x)</a>.
%H A090226 X. Gourdon, <a href="http://numbers.computation.free.fr/Constants/Primes/
               pixtable.html">A Table of values of pi(x)</a>.
%F A090226 a(1)=1; a(n)=pi(10^(n-1))+1 for n>1 where pi(x) is the number of primes 
               less than x - C. Ronaldo (aga_new_ac(AT)hotmail.com), Dec 26 2004
%Y A090226 Cf. A003617 (values of prime(k)).
%Y A090226 Sequence in context: A001705 A081047 A057793 this_sequence A094422 A121750 
               A143341
%Y A090226 Adjacent sequences: A090223 A090224 A090225 this_sequence A090227 A090228 
               A090229
%K A090226 base,nonn
%O A090226 1,2
%A A090226 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 25 2003
%E A090226 Corrected and extended by C. Ronaldo (aga_new_ac(AT)hotmail.com), Dec 
               26 2004

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