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A228413
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Count of the first 10^n primes which do not contain the digit 1.
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20
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1, 6, 54, 532, 4675, 34425, 262549, 2051466, 16831152, 155616459, 1529462564, 14830618421, 141585123501
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OFFSET
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0,2
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LINKS
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FORMULA
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EXAMPLE
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a(2) = 54 since there are 54 primes less than 541 (the 100th prime) that do not contain a 1. Namely: 2, 3, 5, 7, 23, 29, ..., 523.
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MATHEMATICA
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Table[Length[Select[Range[10^n], DigitCount[Prime[#], 10, 1] == 0 &]], {n, 0, 5}] (* Robert Price, Mar 23 2020 *)
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CROSSREFS
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KEYWORD
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nonn,base,more,hard
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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