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

103, 107, 109, 127, 137, 139, 149, 157, 163, 167, 173, 179, 193, 197, 239, 241, 251, 257, 263, 269, 271, 281, 283, 293, 307, 317, 347, 349, 359, 367, 379, 389, 397, 401, 409, 419, 421, 431, 439, 457, 461, 463, 467, 479, 487, 491, 503, 509, 521, 523, 541, 547

Offset: 1

Author

Colin Barker, Jan 04 2014

Keywords

• nonn
• base

Comments

The first term having a repeated digit is 1009.

Links

• Christopher M. Conrey, Table of n, a(n) for n = 1..10000 (first 2000 terms from Colin Barker)
• Christopher M. Conrey, MATLAB Program

Crossrefs

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

Cf. A074675.

Programs

MATLAB

%See Conrey Link

Mathematica

Select[Prime[Range[200]],Count[DigitCount[#],0]==7&] (* Harvey P. Dale, Jul 27 2020 *)

PARI

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