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A152281 Number of 9's among the digits of all n-digit primes. 9

%I #9 Jul 20 2015 03:54:44

%S 0,6,61,579,5484,52015,500811,4873234,47639648,467715626,4606264916,

%T 45472773167,449751152190,4454948367909

%N Number of 9's among the digits of all n-digit primes.

%t Table[Count[Flatten[IntegerDigits/@Prime[Range[PrimePi[10^i]+1,PrimePi[10^(i+1)]]]],9],{i,0,10}] (* _Harvey P. Dale_, Dec 08 2010 *)

%Y Cf. A130817, A152272, A152273, A152274, A152275, A152276, A152277, A152278, A152279, A152280.

%K base,nonn

%O 1,2

%A _Jon E. Schoenfield_, Dec 01 2008

%E a(12)-a(14) from _Giovanni Resta_, Jul 20 2015

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Last modified July 13 13:30 EDT 2024. Contains 374284 sequences. (Running on oeis4.)