The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A235154 Primes which have one or more occurrences of exactly two different digits. 20
 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 113, 131, 151, 181, 191, 199, 211, 223, 227, 229, 233, 277, 311, 313, 331, 337, 353, 373, 383, 433, 443, 449, 499, 557, 577, 599, 661, 677, 727, 733, 757, 773, 787, 797, 811 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The first term having a repeated digit is 101. LINKS Colin Barker, Table of n, a(n) for n = 1..650 PROG (PARI) s=[]; forprime(n=10, 1000, if(#vecsort(eval(Vec(Str(n))), , 8)==2, s=concat(s, n))); s (PARI) is(n)=isprime(n) && #Set(digits(n))==2 \\ Charles R Greathouse IV, Feb 23 2017 CROSSREFS Cf. A235155-A235161, A030291. Sequence in context: A322274 A008365 A132077 * A045921 A296520 A334391 Adjacent sequences:  A235151 A235152 A235153 * A235155 A235156 A235157 KEYWORD nonn,base AUTHOR Colin Barker, Jan 04 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 29 20:42 EDT 2020. Contains 334710 sequences. (Running on oeis4.)