Search: id:A109031
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%I A109031
%S A109031 295245,426816,542592,618624
%N A109031 11-almost primes (A069272) whose digit reversal is different and also 
               has 11 prime factors (with multiplicity). "Emirp Tsolma-11.".
%C A109031 This sequence is the k = 11 instance of the series which begins with 
               k = 1 (emirps), k = 2 (emirpimes), k = 3 (emirp tsolma-3 = A109023), 
               k = 4 (emirp tsolma-4 = A109024), k = 5 (emirp tsolma-5 = A109025), 
               k = 6 (emirp tsolma-6 = A109026), k = 7 (emirp tsolma-7 = A109027), 
               k = 8 (emirp tsolma-8 = A109028), k = 9 (emirp tsolma-9 = A109029), 
               k = 10 (emirp tsolma-10 = A109030).
%C A109031 The Mathematica code for this was written by Ray Chandler who extended 
               this sequence. He also has more values.
%D A109031 Jonathan Vos Post, "1066 and All That: Emirp Tsolma-3 and Related Integer 
               Sequences." Forthcoming paper on this sequence.
%H A109031 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               AlmostPrime.html">Almost Prime</a>.
%H A109031 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Emirp.html">Emirp</a>.
%H A109031 Eric Weisstein and Jonathan Vos Post, <a href="http://mathworld.wolfram.com/
               Emirpimes.html">Emirpimes.</a>
%e A109031 a(1) = 295245 is in this sequence because 295245 = 3^10 * 5 is an 11-almost 
               prime and reverse(295245) = 542592 = 2^7 * 3^3 * 157 is also an 11-almost 
               prime.
%Y A109031 Cf. A069272, A006567, A097393, A109018, A109023-A109030.
%Y A109031 Sequence in context: A158124 A050249 A023351 this_sequence A137817 A137818 
               A164946
%Y A109031 Adjacent sequences: A109028 A109029 A109030 this_sequence A109032 A109033 
               A109034
%K A109031 nonn,base
%O A109031 1,1
%A A109031 Jonathan Vos Post (jvospost3(AT)gmail.com), Jun 16 2005

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