Search: id:A033664
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%I A033664
%S A033664 2,3,5,7,13,17,23,37,43,47,53,67,73,83,97,103,107,113,137,167,173,197,
%T A033664 223,283,307,313,317,337,347,353,367,373,383,397,443,467,503,523,547,
%U A033664 607,613,617,643,647,653,673,683,743,773,797,823,853,883,907,937,947
%N A033664 Every suffix is prime.
%C A033664 Primes in which repeatedly deleting the most significant digit gives 
               a prime at every step until a single digit prime remains.
%C A033664 Every digit string containing the least significant digit is prime. - 
               Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 24 2003
%H A033664 T. D. Noe, <a href="b033664.txt">Table of n, a(n) for n=1..8779</a>
%H A033664 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               TruncatablePrime.html">Link to a section of The World of Mathematics.</
               a>
%o A033664 (PARI) {fileO="b033664.txt";lim=8779;v=vector(lim);v[1]=2;v[2]=3;v[3]=5;
               v[4]=7;j=4; write(fileO,"1 2");write(fileO,"2 3");write(fileO,"3 
               5");write(fileO,"4 7"); p10=1;until(0,p10*=10;j0=j;for(k=1,9,k10=k*p10; 
               for(i=1,j0,if(j==lim,break(3));z=k10+v[i]; if(isprime(z),j++;v[j]=z;
               write(fileO,j," ",z);))));} [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), 
               Sep 20 2008]
%Y A033664 Cf. A024785, A032437, A020994, A024770, A052023, A052024, A052025, A050986, 
               A050987.
%Y A033664 Cf. A024770, A069866.
%Y A033664 Sequence in context: A155777 A067905 A042993 this_sequence A024785 A069866 
               A125772
%Y A033664 Adjacent sequences: A033661 A033662 A033663 this_sequence A033665 A033666 
               A033667
%K A033664 nonn,base,easy,nice
%O A033664 1,1
%A A033664 N. J. A. Sloane (njas(AT)research.att.com).
%E A033664 More terms from Erich Friedman (erich.friedman(AT)stetson.edu).

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