Search: id:A068132
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%I A068132
%S A068132 5995,14878,17578,24976,29890,32896,36856,37675,42778,47278,52975,
%T A068132 53956,54946,55945,56953,57970,67528,68635,69751,70876,75466,76636,
%U A068132 77815,83845,85078,87571,88831,91378,92665,93961,95266,96580,97903
%N A068132 Triangular numbers with sum of digits = 28.
%C A068132 1. The sequence is unbounded, as the (10^k + 9)-th triangular number 
               for k >1 is a term. 2. The sum of the digits of triangular numbers 
               in most cases is a triangular number. 3. Conjecture: For every triangular 
               number T there exist infinitely many triangular numbers with sum 
               of digits = T.
%Y A068132 Cf. A068127, A068128, A068129, A068130, A068131.
%Y A068132 Sequence in context: A028546 A055108 A046903 this_sequence A115429 A046395 
               A143043
%Y A068132 Adjacent sequences: A068129 A068130 A068131 this_sequence A068133 A068134 
               A068135
%K A068132 base,easy,nonn
%O A068132 0,1
%A A068132 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 21 2002
%E A068132 More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 06 
               2002

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