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A231411
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Total number of zero digits in primes less than 10^n.
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9
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0, 0, 15, 232, 2725, 30350, 324133, 3386986, 34984325, 358604948, 3657365837, 37164550469, 376613845818, 3808514755978
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OFFSET
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1,3
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LINKS
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EXAMPLE
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a(3)=15, since there are 15 zeros in primes less than 1000. Namely: 101, 103, 107, 109, 307, 401, 409, 503, 509, 601, 607, 701, 709, 809, 907.
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MATHEMATICA
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Table[Count[IntegerDigits[Prime[Range[PrimePi[10^n-1]]]], 0, 2], {n, 7}] (* Robert Price, Jun 16 2019 *)
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CROSSREFS
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KEYWORD
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nonn,base,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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