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A235155 Primes which have one or more occurrences of exactly three different digits. 5

%I #24 Jan 26 2022 08:30:00

%S 103,107,109,127,137,139,149,157,163,167,173,179,193,197,239,241,251,

%T 257,263,269,271,281,283,293,307,317,347,349,359,367,379,389,397,401,

%U 409,419,421,431,439,457,461,463,467,479,487,491,503,509,521,523,541,547

%N Primes which have one or more occurrences of exactly three different digits.

%C The first term having a repeated digit is 1009.

%H Christopher M. Conrey, <a href="/A235155/b235155.txt">Table of n, a(n) for n = 1..10000</a> (first 2000 terms from Colin Barker)

%H Christopher M. Conrey, <a href="/A235155/a235155.txt">MATLAB Program</a>

%t Select[Prime[Range[200]],Count[DigitCount[#],0]==7&] (* _Harvey P. Dale_, Jul 27 2020 *)

%o (PARI) s=[]; forprime(n=100, 1000, if(#vecsort(eval(Vec(Str(n))),,8)==3, s=concat(s, n))); s

%o (MATLAB) %See Conrey Link

%Y Cf. A235154, A235156, A235157, A235158, A235159, A235160, A235161.

%Y Cf. A074675.

%K nonn,base

%O 1,1

%A _Colin Barker_, Jan 04 2014

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)