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A228413 Count of the first 10^n primes which do not contain the digit 1. 20

%I #30 Mar 19 2024 12:29:21

%S 1,6,54,532,4675,34425,262549,2051466,16831152,155616459,1529462564,

%T 14830618421,141585123501

%N Count of the first 10^n primes which do not contain the digit 1.

%F a(n) <= 9^n. - _Charles R Greathouse IV_, May 21 2014

%e 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.

%t Table[Length[Select[Range[10^n], DigitCount[Prime[#], 10, 1] == 0 &]], {n, 0, 5}] (* _Robert Price_, Mar 23 2020 *)

%Y Cf. A231412, A228413-A228421, A097952, A091634-A091643.

%K nonn,base,more,hard

%O 0,2

%A _Robert Price_, Nov 09 2013

%E a(12) from _Lucas A. Brown_, Mar 19 2024

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Last modified April 20 09:04 EDT 2024. Contains 371799 sequences. (Running on oeis4.)