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A119297
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Total number of 6's digits in the first 10^n primes.
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4
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0, 10, 315, 3824, 47269, 560677, 7079879, 79433407, 887292243, 9778050835, 110518283071, 1198946387631
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OFFSET
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1,2
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LINKS
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EXAMPLE
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At a(2)=10 there are 10 6's digits in the first 10^2 primes.
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MAPLE
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A119297 := proc(n) option remember: local k, s, lim: if(n=0)then return 0:fi: lim:=10^n: s:=procname(n-1): for k from 10^(n-1)+1 to lim do s:=s+nops([SearchAll("6", convert(ithprime(k), string))]): od: return s: end: seq(A119297(n), n=1..4); # Nathaniel Johnston, May 09 2011
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MATHEMATICA
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Table[Count[IntegerDigits[Prime[Range[10^n]]], 6, 2], {n, 6}] (* Robert Price, May 02 2019 *)
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CROSSREFS
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KEYWORD
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more,nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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