%I A119044
%S A119044 1,4,18,58,59,141,471418,185310604,451023506,1184061400,1844511706,
%T A119044 4474395400,14266749459,18444896915,48521543066,11838218371106,
%U A119044 39270880053981
%N A119044 Numbers n such that the n-th triangular number contains only digits {0,
               1,7}.
%C A119044 Next entry must be greater than 1.4*10^16.
%H A119044 G. Resta, <a href="http://www.iit.cnr.it/staff/giovanni.resta/tritri.txt">
               Tridigital Triangular Numbers</a>
%Y A119044 Cf. A000217, A119043. See A119034 for a table of cross-references.
%Y A119044 Sequence in context: A059133 A020644 A027286 this_sequence A058851 A073373 
               A057414
%Y A119044 Adjacent sequences: A119041 A119042 A119043 this_sequence A119045 A119046 
               A119047
%K A119044 nonn,base,more
%O A119044 1,2
%A A119044 Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006