Search: id:A047738
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%I A047738
%S A047738 179210312,179210313,179210314,179210315
%N A047738 Earliest sequence of 4 consecutive economical numbers.
%H A047738 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/
               NonRecursions.html">Non Recursions</a>
%e A047738 179210312 = 2^3* 4733^2; 9 digits in 179219312, 7 digits in its prime 
               factorization, 7 < 9, so that number is economical.
%Y A047738 Cf. A046759.
%Y A047738 Sequence in context: A093047 A093046 A127955 this_sequence A079323 A061440 
               A064593
%Y A047738 Adjacent sequences: A047735 A047736 A047737 this_sequence A047739 A047740 
               A047741
%K A047738 fini,nonn
%O A047738 1,1
%A A047738 Carlos B. Rivera (crivera(AT)primepuzzles.net)

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