%I A044138
%S A044138 49,98,147,196,245,294,343,392,441,490,539,588,637,686,735,784,
%T A044138 833,882,931,980,1029,1078,1127,1176,1225,1274,1323,1372,1421,
%U A044138 1470,1519,1568,1617,1666,1715,1764,1813,1862,1911,1960,2009
%N A044138 Numbers n such that string 0,0 occurs in the base 7 representation of 
               n but not of n-1.
%C A044138 Every element is a multiple of 49. The smallest positive multiple of 
               49 not in the sequence is 2450. - David W. Wilson (davidwwilson(AT)comcast.net), 
               Aug 03 2005
%H A044138 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/
               NonRecursions.html">Non Recursions</a>
%Y A044138 Sequence in context: A044030 A165339 A131601 this_sequence A043394 A044519 
               A031484
%Y A044138 Adjacent sequences: A044135 A044136 A044137 this_sequence A044139 A044140 
               A044141
%K A044138 nonn,base
%O A044138 1,1
%A A044138 Clark Kimberling (ck6(AT)evansville.edu)