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A231595
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Total number of 6's digits in primes less than 10^n.
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0
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0, 2, 33, 369, 3741, 38714, 395621, 4007705, 40484195, 408035120, 4105718243, 41266320918, 414416274953, 4159068898063
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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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a(2)=2, since there are 2 6's in primes less than 100. Namely: 61, 67.
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MATHEMATICA
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Table[Count[IntegerDigits[Prime[Range[PrimePi[10^n - 1]]]], 6, 2], {n, 7}] (* Robert Price, Jun 16 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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