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 A155075 Primes with one digit used exactly twice, all others digits distinct. 1
 11, 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, 877, 881, 883, 887, 911, 919, 929, 977, 991, 997, 1009, 1013, 1019, 1021 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The sequence is finite. The last 10 terms are 98876342501, 98876405231, 98876421053, 98876502143, 98876504123, 98876520143, 98876524013, 98876524301, 98876530421, 98876532401. - Zak Seidov, Dec 18 2014 Number of n-digits terms starting with n=1: {0, 1, 46, 508, 4117, 31395, 187533, 854665, 2989094, 7172381, 6481542}. - Zak Seidov, Jun 04 2015 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 MAPLE G:= proc(d) # to produce all d-digit terms   local L, C, Cc, P, i, x, res;   res:= NULL;   L:= [false, true, false, true, false, false, false, true, false, true];   for C in  combinat:-choose([\$0..9], d-1) do     for i from 1 to d-1 do       Cc:= [op(C), C[i]];       if convert(Cc, `+`) mod 3 = 0 then next fi;       for P in combinat:-permute(Cc) do         if P[-1] = 0 or not L[P[1]+1] then next fi;         x:= add(P[i]*10^(i-1), i=1..nops(P));         if isprime(x) then res:= res, x fi;       od     od   od;   sort([res]); end proc: seq(op(G(d)), d=1..5); # Robert Israel, Jun 04 2015 MATHEMATICA fQ[n_]:=Length[IntegerDigits[n]]-Length[Union[IntegerDigits[n]]]==1; Select[Prime@Range[21713], fQ[#]&] (* Ivan N. Ianakiev, Sep 25 2015 *) PROG (PARI) lista(nn) = {forprime(p=2, nn, my(d = digits(p)); if (#vecsort(d, , 8) == #d-1, print1(p, ", ")); ); } \\ Michel Marcus, Dec 18 2014 CROSSREFS Cf. A000040, A073064. Sequence in context: A091366 A158051 A073064 * A176179 A176196 A303570 Adjacent sequences:  A155072 A155073 A155074 * A155076 A155077 A155078 KEYWORD nonn,fini,base AUTHOR Juri-Stepan Gerasimov, Jan 19 2009 EXTENSIONS Definition clarified by R. J. Mathar, May 05 2010 STATUS approved

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Last modified May 23 07:08 EDT 2019. Contains 323508 sequences. (Running on oeis4.)